diff --git a/conftest.py b/conftest.py
index f6f4f71..044a6b3 100644
--- a/conftest.py
+++ b/conftest.py
@@ -264,6 +264,13 @@ def setup_regtest_frost_bitcoind(pytestconfig):
                     "must be 27 or greater.\n")
     local_command(create_wallet)
     local_command(f'{root_cmd} loadwallet {wallet_name} true true')
+    for i in range(2):
+        cpe = local_command(f'{root_cmd} -rpcwallet={wallet_name} getnewaddress')
+        if cpe.returncode != 0:
+            pytest.exit(f"Cannot setup tests, bitcoin-cli failing.\n{cpe.stdout.decode('utf-8')}")
+        destn_addr = cpe.stdout[:-1].decode('utf-8')
+        local_command(f'{root_cmd} -rpcwallet={wallet_name} generatetoaddress 1 {destn_addr}')
+        sleep(1)
     yield
     # shut down bitcoind
     local_command(stop_cmd)
diff --git a/src/jmbase/commands.py b/src/jmbase/commands.py
index a64309e..ba7f149 100644
--- a/src/jmbase/commands.py
+++ b/src/jmbase/commands.py
@@ -127,20 +127,32 @@ class JMDKGFinalized(JMCommand):
 
 
 """Messages used by FROST parties"""
-
-class JMFROSTInit(JMCommand):
+class JMFROSTReq(JMCommand):
     arguments = [
         (b'hostpubkeyhash', Unicode()),
+        (b'sig', Unicode()),
         (b'session_id', Unicode()),
+    ]
+
+class JMFROSTAck(JMCommand):
+    arguments = [
+        (b'nick', Unicode()),
+        (b'hostpubkeyhash', Unicode()),
         (b'sig', Unicode()),
+        (b'session_id', Unicode()),
+    ]
+
+class JMFROSTInit(JMCommand):
+    arguments = [
+        (b'nick', Unicode()),
+        (b'session_id', Unicode()),
     ]
 
 class JMFROSTRound1(JMCommand):
     arguments = [
         (b'nick', Unicode()),
-        (b'hostpubkeyhash', Unicode()),
         (b'session_id', Unicode()),
-        (b'sig', Unicode()),
+        (b'hostpubkeyhash', Unicode()),
         (b'pub_nonce', Unicode()),
     ]
 
@@ -327,21 +339,33 @@ class JMDKGCMsg2Seen(JMCommand):
 
 
 """Messages used by FROST parties"""
-
-class JMFROSTInitSeen(JMCommand):
+class JMFROSTReqSeen(JMCommand):
     arguments = [
         (b'nick', Unicode()),
         (b'hostpubkeyhash', Unicode()),
+        (b'sig', Unicode()),
         (b'session_id', Unicode()),
+    ]
+
+class JMFROSTAckSeen(JMCommand):
+    arguments = [
+        (b'nick', Unicode()),
+        (b'hostpubkeyhash', Unicode()),
         (b'sig', Unicode()),
+        (b'session_id', Unicode()),
+    ]
+
+class JMFROSTInitSeen(JMCommand):
+    arguments = [
+        (b'nick', Unicode()),
+        (b'session_id', Unicode()),
     ]
 
 class JMFROSTRound1Seen(JMCommand):
     arguments = [
         (b'nick', Unicode()),
-        (b'hostpubkeyhash', Unicode()),
         (b'session_id', Unicode()),
-        (b'sig', Unicode()),
+        (b'hostpubkeyhash', Unicode()),
         (b'pub_nonce', Unicode()),
     ]
 
diff --git a/src/jmclient/client_protocol.py b/src/jmclient/client_protocol.py
index e0dd62d..a08b2f2 100644
--- a/src/jmclient/client_protocol.py
+++ b/src/jmclient/client_protocol.py
@@ -583,45 +583,76 @@ class JMClientProtocol(BaseClientProtocol):
 
     """FROST specifics
     """
-    def frost_init(self, dkg_session_id, msg_bytes):
-        jlog.debug(f'Coordinator call frost_init')
+    def frost_req(self, dkg_session_id, msg_bytes):
+        jlog.debug(f'Coordinator call frost_req')
         client = self.factory.client
-        hostpubkeyhash, session_id, sig = client.frost_init(
+        hostpubkeyhash, sig, session_id = client.frost_req(
             dkg_session_id, msg_bytes)
         coordinator = client.frost_coordinators.get(session_id)
         session = client.frost_sessions.get(session_id)
         if session_id and session and coordinator:
-            d = self.callRemote(commands.JMFROSTInit,
-                                hostpubkeyhash=hostpubkeyhash,
-                                session_id=bintohex(session_id),
-                                sig=sig)
+            d = self.callRemote(commands.JMFROSTReq,
+                                hostpubkeyhash=hostpubkeyhash, sig=sig,
+                                session_id=bintohex(session_id))
             self.defaultCallbacks(d)
-            coordinator.frost_init_sec = time.time()
+            coordinator.frost_req_sec = time.time()
             return session_id, coordinator, session
         return None, None, None
 
+    @commands.JMFROSTReqSeen.responder
+    def on_JM_FROST_REQ_SEEN(self, nick, hostpubkeyhash, sig, session_id):
+        wallet = self.client.wallet_service.wallet
+        if not isinstance(wallet, FrostWallet) or wallet._dkg is None:
+            return {'accepted': True}
+
+        client = self.factory.client
+        session_id = hextobin(session_id)
+        nick, hostpubkeyhash, sig, session_id = \
+            client.on_frost_req(nick, hostpubkeyhash, sig, session_id)
+        if sig:
+            d = self.callRemote(commands.JMFROSTAck,
+                                nick=nick,
+                                hostpubkeyhash=hostpubkeyhash, sig=sig,
+                                session_id=session_id)
+            self.defaultCallbacks(d)
+        return {'accepted': True}
+
+    @commands.JMFROSTAckSeen.responder
+    def on_JM_FROST_ACK_SEEN(self, nick, hostpubkeyhash, sig, session_id):
+        wallet = self.client.wallet_service.wallet
+        if not isinstance(wallet, FrostWallet) or wallet._dkg is None:
+            return {'accepted': True}
+
+        client = self.factory.client
+        bin_session_id = hextobin(session_id)
+        if client.on_frost_ack(nick, hostpubkeyhash, sig, bin_session_id):
+            d = self.callRemote(commands.JMFROSTInit,
+                                nick=nick, session_id=session_id)
+            self.defaultCallbacks(d)
+        return {'accepted': True}
+
     @commands.JMFROSTInitSeen.responder
-    def on_JM_FROST_INIT_SEEN(self, nick, hostpubkeyhash, session_id, sig):
+    def on_JM_FROST_INIT_SEEN(self, nick, session_id):
         wallet = self.client.wallet_service.wallet
         if not isinstance(wallet, FrostWallet) or wallet._dkg is None:
             return {'accepted': True}
 
         client = self.factory.client
         session_id = hextobin(session_id)
-        nick, hostpubkeyhash, session_id, sig, pub_nonce = \
-            client.on_frost_init(nick, hostpubkeyhash, session_id, sig)
+        nick, session_id, pubkeyhash, pub_nonce = \
+            client.on_frost_init(nick, session_id)
         if pub_nonce:
             pub_nonce_b64 = base64.b64encode(pub_nonce).decode('ascii')
             d = self.callRemote(commands.JMFROSTRound1,
-                                nick=nick, hostpubkeyhash=hostpubkeyhash,
-                                session_id=session_id, sig=sig,
+                                nick=nick, session_id=session_id,
+                                hostpubkeyhash=pubkeyhash,
                                 pub_nonce=pub_nonce_b64)
             self.defaultCallbacks(d)
         return {'accepted': True}
 
     @commands.JMFROSTRound1Seen.responder
-    def on_JM_FROST_ROUND1_SEEN(self, nick, hostpubkeyhash,
-                                session_id, sig, pub_nonce):
+    def on_JM_FROST_ROUND1_SEEN(self, nick, session_id,
+                                hostpubkeyhash, pub_nonce):
         wallet = self.client.wallet_service.wallet
         if not isinstance(wallet, FrostWallet) or wallet._dkg is None:
             return {'accepted': True}
@@ -630,8 +661,8 @@ class JMClientProtocol(BaseClientProtocol):
         bin_session_id = hextobin(session_id)
         pub_nonce = base64.b64decode(pub_nonce)
         ready_nicks, nonce_agg, dkg_session_id, ids, msg = \
-            client.on_frost_round1(nick, hostpubkeyhash, bin_session_id,
-                                   sig, pub_nonce)
+            client.on_frost_round1(
+                nick, bin_session_id, hostpubkeyhash, pub_nonce)
         if ready_nicks and nonce_agg:
             for nick in ready_nicks:
                 self.frost_agg1(nick, session_id, nonce_agg,
diff --git a/src/jmclient/cryptoengine.py b/src/jmclient/cryptoengine.py
index 2ce2757..1f7f172 100644
--- a/src/jmclient/cryptoengine.py
+++ b/src/jmclient/cryptoengine.py
@@ -542,7 +542,7 @@ class BTC_P2TR_FROST(BTC_P2TR):
         spent_outputs = kwargs['spent_outputs']
         sighash = SignatureHashSchnorr(tx, i, spent_outputs)
         mixdepth, address_type, index = wallet.get_details(path)
-        sig, pubkey, tweaked_pubkey = await wallet.ipc_client.frost_sign(
+        sig, pubkey, tweaked_pubkey = await wallet.ipc_client.frost_req(
             mixdepth, address_type, index, sighash)
         if not sig:
             return None, "FROST signing failed"
diff --git a/src/jmclient/frost_clients.py b/src/jmclient/frost_clients.py
index fe1fd44..4780e40 100644
--- a/src/jmclient/frost_clients.py
+++ b/src/jmclient/frost_clients.py
@@ -665,7 +665,7 @@ class FROSTCoordinator:
 
     def __init__(self, *, session_id, hostpubkey, dkg_session_id, msg):
         self.session_id = session_id
-        self.frost_init_sec = 0
+        self.frost_req_sec = 0
         self.hostpubkey = hostpubkey
         self.dkg_session_id = dkg_session_id
         self.msg = msg
@@ -681,7 +681,7 @@ class FROSTCoordinator:
 
     def __repr__(self):
         return (f'FROSTCoordinator(session_id={self.session_id}, '
-                f'frost_init_sec={self.frost_init_sec}, '
+                f'frost_req_sec={self.frost_req_sec}, '
                 f'hostpubkey={self.hostpubkey}, '
                 f'dkg_session_id={self.dkg_session_id}, '
                 f'msg={self.msg}, '
@@ -726,7 +726,7 @@ class FROSTClient(DKGClient):
         self.frost_coordinators = dict()
         self.frost_sessions = dict()
 
-    def frost_init(self, dkg_session_id, msg_bytes):
+    def frost_req(self, dkg_session_id, msg_bytes):
         try:
             wallet = self.wallet_service.wallet
             hostseckey = wallet._hostseckey[:32]
@@ -760,18 +760,18 @@ class FROSTClient(DKGClient):
             coordinator.sessions[hostpubkey]['pub_nonce'] = pub_nonce
             coin_key = CCoinKey.from_secret_bytes(hostseckey)
             sig = coin_key.sign_schnorr_no_tweak(session_id)
-            return hostpubkeyhash.hex(), session_id, sig.hex()
+            return hostpubkeyhash.hex(), sig.hex(), session_id
         except Exception as e:
-            jlog.error(f'frost_init: {repr(e)}')
+            jlog.error(f'frost_req: {repr(e)}')
         return None, None, None
 
-    def on_frost_init(self, nick, pubkeyhash, session_id, sig):
+    def on_frost_req(self, nick, hostpubkeyhash, sig, session_id):
         try:
             if session_id in self.frost_sessions:
                 raise Exception(f'session {session_id.hex()} already exists')
-            pubkey = self.find_pubkey_by_pubkeyhash(pubkeyhash)
+            pubkey = self.find_pubkey_by_pubkeyhash(hostpubkeyhash)
             if not pubkey:
-                raise Exception(f'pubkey for {pubkeyhash.hex()} not found')
+                raise Exception(f'pubkey for {hostpubkeyhash} not found')
             xpubkey = XOnlyPubKey(pubkey[1:])
             if not xpubkey.verify_schnorr(session_id, hextobin(sig)):
                 raise Exception('signature verification failed')
@@ -784,7 +784,7 @@ class FROSTClient(DKGClient):
                     self.my_id = i
                     break
             assert self.my_id is not None
-            hostpubkeyhash = sha256(hostpubkey).digest()
+            my_hostpubkeyhash = sha256(hostpubkey).digest()
             session = FROSTSession(session_id=session_id,
                                    hostpubkey=hostpubkey,
                                    coord_nick=nick,
@@ -792,12 +792,41 @@ class FROSTClient(DKGClient):
             self.frost_sessions[session_id] = session
             coin_key = CCoinKey.from_secret_bytes(hostseckey)
             sig = coin_key.sign_schnorr_no_tweak(session_id)
+            return (nick, my_hostpubkeyhash.hex(), sig.hex(), session_id.hex())
+        except Exception as e:
+            jlog.error(f'on_frost_req: {repr(e)}')
+        return None, None, None, None
+
+    def on_frost_ack(self, nick, hostpubkeyhash, sig, session_id):
+        try:
+            pubkey = self.find_pubkey_by_pubkeyhash(hostpubkeyhash)
+            if not pubkey:
+                raise Exception(f'pubkey for {hostpubkeyhash} not found')
+            xpubkey = XOnlyPubKey(pubkey[1:])
+            if not xpubkey.verify_schnorr(session_id, hextobin(sig)):
+                raise Exception('signature verification failed')
+            return True
+        except Exception as e:
+            jlog.error(f'on_frost_ack: {repr(e)}')
+        return False
+
+    def on_frost_init(self, nick, session_id):
+        try:
+            session = self.frost_sessions.get(session_id)
+            if not session:
+                raise Exception(f'session {session_id.hex()} not found')
+            if session.sec_nonce:
+                raise Exception(f'session.sec_nonce already set '
+                                f'for {session_id.hex()}')
+            wallet = self.wallet_service.wallet
+            hostseckey = wallet._hostseckey[:32]
+            hostpubkey = hostpubkey_gen(hostseckey)
+            pubkeyhash = sha256(hostpubkey).digest()
             pub_nonce = self.frost_round1(session_id)
-            return (nick, hostpubkeyhash.hex(), session_id.hex(),
-                    sig.hex(), pub_nonce)
+            return (nick, session_id.hex(), pubkeyhash.hex(), pub_nonce)
         except Exception as e:
             jlog.error(f'on_frost_init: {repr(e)}')
-        return None, None, None, None, None
+        return None, None, None, None
 
     def frost_round1(self, session_id):
         try:
@@ -815,7 +844,7 @@ class FROSTClient(DKGClient):
         except Exception as e:
             jlog.error(f'frost_round1: {repr(e)}')
 
-    def on_frost_round1(self, nick, pubkeyhash, session_id, sig, pub_nonce):
+    def on_frost_round1(self, nick, session_id, pubkeyhash, pub_nonce):
         try:
             coordinator = self.frost_coordinators.get(session_id)
             if not coordinator:
@@ -827,9 +856,6 @@ class FROSTClient(DKGClient):
             pubkey = self.find_pubkey_by_pubkeyhash(pubkeyhash)
             if not pubkey:
                 raise Exception(f'pubkey for {pubkeyhash} not found')
-            xpubkey = XOnlyPubKey(pubkey[1:])
-            if not xpubkey.verify_schnorr(session_id, hextobin(sig)):
-                raise Exception(f'signature verification failed')
             if pubkey in coordinator.parties:
                 jlog.debug(f'pubkey {pubkey.hex()} already in'
                            f' coordinator parties')
@@ -1003,7 +1029,7 @@ class FROSTClient(DKGClient):
                 await asyncio.sleep(1)
                 if coordinator.sig:
                     break
-                waiting_sec = time.time() - coordinator.frost_init_sec
+                waiting_sec = time.time() - coordinator.frost_req_sec
                 if waiting_sec > self.FROST_WAIT_SEC:
                     raise Exception(f'timed out FROST session '
                                     f'{session_id.hex()}')
diff --git a/src/jmclient/frost_ipc.py b/src/jmclient/frost_ipc.py
index 519494c..05955d7 100644
--- a/src/jmclient/frost_ipc.py
+++ b/src/jmclient/frost_ipc.py
@@ -77,9 +77,9 @@ class FrostIPCServer(IPCBase):
                 if cmd == 'get_dkg_pubkey':
                     task = self.loop.create_task(
                         self.on_get_dkg_pubkey(msg_id, *data))
-                elif cmd == 'frost_sign':
+                elif cmd == 'frost_req':
                     task = self.loop.create_task(
-                        self.on_frost_sign(msg_id, *data))
+                        self.on_frost_req(msg_id, *data))
                 if task:
                     self.tasks.add(task)
             except Exception as e:
@@ -118,7 +118,7 @@ class FrostIPCServer(IPCBase):
         except Exception as e:
             jlog.error(f'FrostIPCServer.send_dkg_pubkey: {repr(e)}')
 
-    async def on_frost_sign(self, msg_id, mixdepth, address_type, index,
+    async def on_frost_req(self, msg_id, mixdepth, address_type, index,
                             sighash):
         try:
             wallet = self.wallet
@@ -126,12 +126,12 @@ class FrostIPCServer(IPCBase):
             frost_client = wallet.client_factory.client
             dkg = wallet.dkg
             dkg_session_id = dkg.find_session(mixdepth, address_type, index)
-            session_id, _, _ = client.frost_init(dkg_session_id, sighash)
+            session_id, _, _ = client.frost_req(dkg_session_id, sighash)
             sig, tweaked_pubkey = await frost_client.wait_on_sig(session_id)
             pubkey = dkg.find_dkg_pubkey(mixdepth, address_type, index)
             await self.send_frost_sig(msg_id, sig, pubkey, tweaked_pubkey)
         except Exception as e:
-            jlog.error(f'FrostIPCServer.on_frost_sign: {repr(e)}')
+            jlog.error(f'FrostIPCServer.on_frost_req: {repr(e)}')
             await self.send_frost_sig(msg_id, None, None, None)
 
     async def send_frost_sig(self, msg_id, sig, pubkey, tweaked_pubkey):
@@ -232,15 +232,15 @@ class FrostIPCClient(IPCBase):
         except Exception as e:
             jlog.error(f'FrostIPCClient.get_dkg_pubkey: {repr(e)}')
 
-    async def frost_sign(self, mixdepth, address_type, index, sighash):
-        jlog.debug(f'FrostIPCClient.frost_sign for mixdepth={mixdepth}, '
+    async def frost_req(self, mixdepth, address_type, index, sighash):
+        jlog.debug(f'FrostIPCClient.frost_req for mixdepth={mixdepth}, '
                    f'address_type={address_type}, index={index}, '
                    f'sighash={sighash.hex()}')
         try:
             self.msg_id += 1
             msg_dict = {
                 'msg_id': self.msg_id,
-                'cmd': 'frost_sign',
+                'cmd': 'frost_req',
                 'data': (mixdepth, address_type, index, sighash),
             }
             self.sw.write(self.encrypt_msg(msg_dict))
@@ -251,16 +251,16 @@ class FrostIPCClient(IPCBase):
             sig, pubkey, tweaked_pubkey = fut.result()
             if sig is None:
                 jlog.error(
-                    f'FrostIPCClient.frost_sign got None sig value from '
+                    f'FrostIPCClient.frost_req got None sig value from '
                     f'FrostIPCServer for mixdepth={mixdepth}, '
                     f'address_type={address_type}, index={index}, '
                     f'sighash={sighash.hex()}')
                 return sig, pubkey, tweaked_pubkey
             jlog.debug(
-                f'FrostIPCClient.frost_sign successfully got signature '
+                f'FrostIPCClient.frost_req successfully got signature '
                 f'for mixdepth={mixdepth}, address_type={address_type}, '
                 f'index={index}, sighash={sighash.hex()}')
             return sig, pubkey, tweaked_pubkey
         except Exception as e:
-            jlog.error(f'FrostIPCClient.frost_sign: {repr(e)}')
+            jlog.error(f'FrostIPCClient.frost_req: {repr(e)}')
             return None, None, None
diff --git a/src/jmclient/maker.py b/src/jmclient/maker.py
index 72c5eb0..f0a5d36 100644
--- a/src/jmclient/maker.py
+++ b/src/jmclient/maker.py
@@ -127,7 +127,7 @@ class Maker(object):
             path = wallet.addr_to_path(auth_address)
             md, address_type, index = wallet.get_details(path)
             kphex_hash = hashlib.sha256(bintohex(kphex).encode()).digest()
-            sig, _, tweaked_pubkey = await wallet.ipc_client.frost_sign(
+            sig, _, tweaked_pubkey = await wallet.ipc_client.frost_req(
                 md, address_type, index, kphex_hash)
             sig = base64.b64encode(sig).decode('ascii')
             if not sig:
diff --git a/src/jmclient/wallet_utils.py b/src/jmclient/wallet_utils.py
index a78ea2b..bc6d674 100644
--- a/src/jmclient/wallet_utils.py
+++ b/src/jmclient/wallet_utils.py
@@ -1962,7 +1962,7 @@ async def wallet_tool_main(wallet_root_path):
         msg = 'testmsg'
         md = address_type = index = 0
         msghash = sha256(msg.encode()).digest()
-        sig, pubkey, tweaked_pubkey = await wallet.ipc_client.frost_sign(
+        sig, pubkey, tweaked_pubkey = await wallet.ipc_client.frost_req(
             md, address_type, index, msghash)
         verify_pubkey = XOnlyPubKey(tweaked_pubkey[1:])
         if verify_pubkey.verify_schnorr(msghash, sig):
diff --git a/src/jmdaemon/daemon_protocol.py b/src/jmdaemon/daemon_protocol.py
index 30cb96a..80be05b 100644
--- a/src/jmdaemon/daemon_protocol.py
+++ b/src/jmdaemon/daemon_protocol.py
@@ -26,9 +26,11 @@ from twisted.web import server
 from txtorcon.socks import HostUnreachableError
 from twisted.python import log
 import urllib.parse as urlparse
+from collections import defaultdict
 from urllib.parse import urlencode
 import json
 import threading
+import time
 import os
 from io import BytesIO
 import copy
@@ -485,6 +487,32 @@ class JMDaemonServerProtocol(amp.AMP, OrderbookWatch):
         self.use_fidelity_bond = False
         self.offerlist = None
         self.kp = None
+        self.frost_crypto_boxes = {}
+        self.frost_expected_msgs = defaultdict(lambda: defaultdict(dict))
+        self.frost_cleanup_loop = task.LoopingCall(self.frost_cleanup)
+
+    def frost_cleanup(self):
+        now = time.time()
+        boxes = self.frost_crypto_boxes
+        cleanup_list = []
+        for nick, sessions in boxes.items():
+            for session_id, box in sessions.items():
+                if now - box['created'] > 120:
+                    cleanup_list.append((nick, session_id))
+        for nick, session_id in cleanup_list:
+            boxes[nick].pop(session_id)
+            if not boxes[nick]:
+                boxes.pop(nick)
+        msgs = self.frost_expected_msgs
+        cleanup_list = []
+        for nick, cmds in msgs.items():
+            for cmd, cmd_data in cmds.items():
+                if now - cmd_data['created'] > 120:
+                    cleanup_list.append((nick, cmd))
+        for nick, cmd in cleanup_list:
+            msgs[nick].pop(cmd)
+            if not msgs[nick]:
+                msgs.pop(nick)
 
     def checkClientResponse(self, response):
         """A generic check of client acceptance; any failure
@@ -555,6 +583,8 @@ class JMDaemonServerProtocol(amp.AMP, OrderbookWatch):
                                               self.on_dkgfinalized,
                                               self.on_dkgcmsg1,
                                               self.on_dkgcmsg2,
+                                              self.on_frostreq,
+                                              self.on_frostack,
                                               self.on_frostinit,
                                               self.on_frostround1,
                                               self.on_frostround2,
@@ -582,7 +612,7 @@ class JMDaemonServerProtocol(amp.AMP, OrderbookWatch):
         assert self.jm_state == 0
         self.role = role
         self.crypto_boxes = {}
-        self.kp = init_keypair()
+        self.kp = init_keypair()  # FIXME not used by maker, mv to taker code?
         d = self.callRemote(JMSetupDone)
         self.defaultCallbacks(d)
         #Request orderbook here, on explicit setup request from client,
@@ -658,29 +688,114 @@ class JMDaemonServerProtocol(amp.AMP, OrderbookWatch):
 
     """FROST specific responders
     """
+    @JMFROSTReq.responder
+    def on_JM_FROST_REQ(self, hostpubkeyhash, sig, session_id):
+        if not self.frost_cleanup_loop.running:
+            self.frost_cleanup_loop.start(30.0)
+        boxes = self.frost_crypto_boxes
+        nick_boxes = boxes.get(None, {})  # None for self
+        session_box = nick_boxes.get(session_id, {})
+        if session_box:
+            log.msg(f'on_JM_FROST_REQ: session_id "{session_id}" '
+                    f'setup is incorrect. '
+                    f'FROST request aborted.')
+            return {'accepted': True}
+        kp = init_keypair()
+        session_box['kp'] = kp
+        session_box['created'] = time.time()
+        nick_boxes[session_id] = session_box
+        boxes[None] = nick_boxes  # None for self
+        dh_pubk = kp.hex_pk().decode('ascii')
+        req_msg = f'!frostreq {hostpubkeyhash} {sig} {session_id} {dh_pubk}'
+        self.mcc.pubmsg(req_msg)
+        return {'accepted': True}
+
+    @JMFROSTAck.responder
+    def on_JM_FROST_ACK(self, nick, hostpubkeyhash, sig, session_id):
+        boxes = self.frost_crypto_boxes
+        self_boxes = boxes.get(None, {})  # None for self
+        session_box = self_boxes.get(session_id, {})
+        if session_box:
+            log.msg(f'on_JM_FROST_ACK: session_id "{session_id}" '
+                    f'setup is incorrect. '
+                    f'FROST request aborted.')
+            return {'accepted': True}
+        kp = init_keypair()
+        session_box['kp'] = kp
+        session_box['created'] = time.time()
+        self_boxes[session_id] = session_box
+        boxes[None] = self_boxes  # None for self
+
+        nick_boxes = boxes.get(nick, {})
+        nick_session_box = nick_boxes.get(session_id, {})
+        if not nick_session_box:
+            log.msg(f'on_JM_FROST_ACK: nick {nick}, session_id "{session_id}" '
+                    f'setup is incorrect. '
+                    f'FROST request aborted.')
+            return {'accepted': True}
+        try:
+            nick_dh_pubk = nick_session_box['dh_pubk']
+            nick_session_box['crypto_box'] = as_init_encryption(
+                kp, init_pubkey(nick_dh_pubk))
+        except NaclError as e:
+            log.msg('on frostround1: error creating crypto_box. '
+                        'FROST session aborted')
+            return {'accepted': True}
+
+        self.frost_expected_msgs[nick]['frostinit'] = {
+            'session_id': session_id,
+            'created': time.time(),
+        }
+        dh_pubk = kp.hex_pk().decode('ascii')
+        ack_msg = f'{hostpubkeyhash} {sig} {session_id} {dh_pubk}'
+        self.mcc.prepare_privmsg(nick, 'frostack', ack_msg)
+        return {'accepted': True}
+
     @JMFROSTInit.responder
-    def on_JM_FROST_INIT(self, hostpubkeyhash, session_id, sig):
-        self.mcc.pubmsg(f'!frostinit {hostpubkeyhash} {session_id} {sig}')
+    def on_JM_FROST_INIT(self, nick, session_id):
+        self.frost_expected_msgs[nick]['frostround1'] = {
+            'session_id': session_id,
+            'created': time.time(),
+        }
+        init_msg = f'{session_id}'
+        self.mcc.prepare_privmsg(nick, 'frostinit', init_msg)
         return {'accepted': True}
 
     @JMFROSTRound1.responder
-    def on_JM_FROST_ROUND1(self, nick, hostpubkeyhash,
-                           session_id, sig, pub_nonce):
-        msg = f'{hostpubkeyhash} {session_id} {sig} {pub_nonce}'
-        self.mcc.prepare_privmsg(nick, "frostround1", msg)
+    def on_JM_FROST_ROUND1(self, nick, hostpubkeyhash, session_id, pub_nonce):
+        self.frost_expected_msgs[nick]['frostagg1'] = {
+            'session_id': session_id,
+            'created': time.time(),
+        }
+        round1_msg = f'{session_id} {hostpubkeyhash} {pub_nonce}'
+        self.mcc.prepare_privmsg(nick, "frostround1", round1_msg)
         return {'accepted': True}
 
     @JMFROSTAgg1.responder
     def on_JM_FROST_AGG1(self, nick, session_id,
                          nonce_agg, dkg_session_id, ids, msg):
-        msg = f'{session_id} {nonce_agg} {dkg_session_id} {ids} {msg}'
-        self.mcc.prepare_privmsg(nick, "frostagg1", msg)
+        self.frost_expected_msgs[nick]['frostround2'] = {
+            'session_id': session_id,
+            'created': time.time(),
+        }
+        agg1_msg = f'{session_id} {nonce_agg} {dkg_session_id} {ids} {msg}'
+        self.mcc.prepare_privmsg(nick, "frostagg1", agg1_msg)
         return {'accepted': True}
 
     @JMFROSTRound2.responder
     def on_JM_FROST_ROUND2(self, nick, session_id, partial_sig):
         msg = f'{session_id} {partial_sig}'
         self.mcc.prepare_privmsg(nick, "frostround2", msg)
+        # cleanup frost_crypto_boxes
+        boxes = self.frost_crypto_boxes
+        cleanup_list = []
+        for nick, sessions in boxes.items():
+            if session_id in sessions:
+                cleanup_list.append((nick, session_id))
+        for nick, session_id in cleanup_list:
+            boxes[nick].pop(session_id)
+            if not boxes[nick]:
+                boxes.pop(nick)
         return {'accepted': True}
 
 
@@ -848,16 +963,60 @@ class JMDaemonServerProtocol(amp.AMP, OrderbookWatch):
                             ext_recovery=ext_recovery)
         self.defaultCallbacks(d)
 
-    def on_frostinit(self, nick, hostpubkeyhash, session_id, sig):
-        d = self.callRemote(JMFROSTInitSeen,
+    def on_frostreq(self, nick, hostpubkeyhash, sig, session_id, dh_pubk):
+        boxes = self.frost_crypto_boxes
+        nick_boxes = boxes.get(nick, {})
+        session_box = nick_boxes.get(session_id, {})
+        if not session_box and not 'dh_pubk' in session_box:
+            session_box['dh_pubk'] = dh_pubk
+            session_box['created'] = time.time()
+            nick_boxes[session_id] = session_box
+            boxes[nick] = nick_boxes
+
+            d = self.callRemote(JMFROSTReqSeen,
+                                nick=nick, hostpubkeyhash=hostpubkeyhash,
+                                sig=sig, session_id=session_id)
+            self.defaultCallbacks(d)
+
+    def on_frostack(self, nick, hostpubkeyhash, sig, session_id, dh_pubk):
+        boxes = self.frost_crypto_boxes
+        nick_boxes = boxes.get(nick, {})
+        session_box = nick_boxes.get(session_id, {})
+        if not session_box and not 'dh_pubk' in session_box:
+            session_box['dh_pubk'] = dh_pubk
+            session_box['created'] = time.time()
+            nick_boxes[session_id] = session_box
+            boxes[nick] = nick_boxes
+
+        self_boxes = boxes.get(None, {})
+        self_session_box = self_boxes.get(session_id, {})
+        if not self_session_box or not 'kp' in self_session_box:
+            log.msg(f'on_frostack: session_id "{session_id}" '
+                    f' setup is incorrect. '
+                    f'FROST session aborted.')
+            return
+        try:
+            kp = self_session_box['kp']
+            session_box['crypto_box'] = as_init_encryption(
+                kp, init_pubkey(dh_pubk))
+        except NaclError as e:
+            log.msg('on frostround1: error creating crypto_box. '
+                    'FROST session aborted')
+            return
+        d = self.callRemote(JMFROSTAckSeen,
                             nick=nick, hostpubkeyhash=hostpubkeyhash,
-                            session_id=session_id, sig=sig)
+                            sig=sig, session_id=session_id)
         self.defaultCallbacks(d)
 
-    def on_frostround1(self, nick, hostpubkeyhash, session_id, sig, pub_nonce):
+    def on_frostinit(self, nick, session_id):
+        d = self.callRemote(JMFROSTInitSeen,
+                            nick=nick, session_id=session_id)
+        self.defaultCallbacks(d)
+
+    def on_frostround1(self, nick, session_id, hostpubkeyhash, pub_nonce):
         d = self.callRemote(JMFROSTRound1Seen,
-                            nick=nick, hostpubkeyhash=hostpubkeyhash,
-                            session_id=session_id, sig=sig,
+                            nick=nick, session_id=session_id,
+                            hostpubkeyhash=hostpubkeyhash,
                             pub_nonce=pub_nonce)
         self.defaultCallbacks(d)
 
@@ -866,6 +1025,16 @@ class JMDaemonServerProtocol(amp.AMP, OrderbookWatch):
                             nick=nick, session_id=session_id,
                             partial_sig=partial_sig)
         self.defaultCallbacks(d)
+        # cleanup frost_crypto_boxes
+        boxes = self.frost_crypto_boxes
+        cleanup_list = []
+        for nick, sessions in boxes.items():
+            if session_id in sessions:
+                cleanup_list.append((nick, session_id))
+        for nick, session_id in cleanup_list:
+            boxes[nick].pop(session_id)
+            if not boxes[nick]:
+                boxes.pop(nick)
 
     def on_frostagg1(self, nick, session_id,
                      nonce_agg, dkg_session_id, ids, msg):
@@ -1169,7 +1338,9 @@ class JMDaemonServerProtocol(amp.AMP, OrderbookWatch):
         """Retrieve the libsodium box object for the counterparty;
         stored differently for Taker and Maker
         """
-        if nick in self.crypto_boxes and self.crypto_boxes[nick] != None:
+        if nick in self.frost_crypto_boxes:
+            return self.frost_crypto_boxes[nick]
+        elif nick in self.crypto_boxes and self.crypto_boxes[nick] != None:
             return self.crypto_boxes[nick][1]
         elif nick in self.active_orders and self.active_orders[nick] != None \
              and "crypto_box" in self.active_orders[nick]:
diff --git a/src/jmdaemon/message_channel.py b/src/jmdaemon/message_channel.py
index c4f0e2a..11a2d8a 100644
--- a/src/jmdaemon/message_channel.py
+++ b/src/jmdaemon/message_channel.py
@@ -207,7 +207,7 @@ class MessageChannelCollection(object):
 
     #END PUBLIC/BROADCAST SECTION
 
-    def get_encryption_box(self, cmd, nick):
+    def get_encryption_box(self, cmd, nick, extra=None):
         """Establish whether the message is to be
         encrypted/decrypted based on the command string.
         If so, retrieve the appropriate crypto_box object
@@ -215,12 +215,25 @@ class MessageChannelCollection(object):
         if cmd in plaintext_commands:
             return None, False
         else:
-            return self.daemon.get_crypto_box_from_nick(nick), True
+            if cmd in ['frostinit', 'frostround1', 'frostagg1', 'frostround2']:
+                boxes = self.daemon.get_crypto_box_from_nick(nick)
+                if boxes:
+                    if extra:
+                        box = boxes.get(extra)['crypto_box']
+                    else:
+                        box = None
+            else:
+                box = self.daemon.get_crypto_box_from_nick(nick)
+            return box, True
 
     @check_privmsg
     def prepare_privmsg(self, nick, cmd, message, mc=None):
         # should we encrypt?
-        box, encrypt = self.get_encryption_box(cmd, nick)
+        if cmd in ['frostinit', 'frostround1', 'frostagg1', 'frostround2']:
+            session_id = message.split()[0]
+            box, encrypt = self.get_encryption_box(cmd, nick, extra=session_id)
+        else:
+            box, encrypt = self.get_encryption_box(cmd, nick)
         if encrypt:
             if not box:
                 log.debug('error, dont have encryption box object for ' + nick +
@@ -617,6 +630,8 @@ class MessageChannelCollection(object):
                                  on_dkgfinalized=None,
                                  on_dkgcmsg1=None,
                                  on_dkgcmsg2=None,
+                                 on_frostreq=None,
+                                 on_frostack=None,
                                  on_frostinit=None,
                                  on_frostround1=None,
                                  on_frostround2=None,
@@ -626,8 +641,9 @@ class MessageChannelCollection(object):
                 on_dkginit,
                 on_dkgpmsg1, on_dkgpmsg2, on_dkgfinalized,
                 on_dkgcmsg1, on_dkgcmsg2,
-                on_frostinit,
-                on_frostround1, on_frostround2, on_frostagg1)
+                on_frostreq, on_frostack,
+                on_frostinit, on_frostround1,
+                on_frostround2, on_frostagg1)
 
     def on_verified_privmsg(self, nick, message, hostid):
         """Called from daemon when message was successfully verified,
@@ -692,6 +708,8 @@ class MessageChannel(object):
         self.on_dkgfinalized = None
         self.on_dkgcmsg1 = None
         self.on_dkgcmsg2 = None
+        self.on_frostreq = None
+        self.on_frostack = None
         self.on_frostinit = None
         self.on_frostround1 = None
         self.on_frostround2 = None
@@ -810,6 +828,8 @@ class MessageChannel(object):
                                  on_dkgfinalized=None,
                                  on_dkgcmsg1=None,
                                  on_dkgcmsg2=None,
+                                 on_frostreq=None,
+                                 on_frostack=None,
                                  on_frostinit=None,
                                  on_frostround1=None,
                                  on_frostround2=None,
@@ -820,6 +840,8 @@ class MessageChannel(object):
         self.on_dkgfinalized = on_dkgfinalized
         self.on_dkgcmsg1 = on_dkgcmsg1
         self.on_dkgcmsg2 = on_dkgcmsg2
+        self.on_frostreq = on_frostreq
+        self.on_frostack = on_frostack
         self.on_frostinit = on_frostinit
         self.on_frostround1 = on_frostround1
         self.on_frostround2 = on_frostround2
@@ -952,16 +974,17 @@ class MessageChannel(object):
                 except (ValueError, IndexError) as e:
                     log.debug("!dkginit" + repr(e))
                     return
-            elif _chunks[0] == 'frostinit':
+            elif _chunks[0] == 'frostreq':
                 try:
                     hostpubkeyhash = _chunks[1]
-                    session_id = _chunks[2]
-                    sig = _chunks[3]
-                    if self.on_frostinit:
-                        self.on_frostinit(nick, hostpubkeyhash,
-                                          session_id, sig)
+                    sig = _chunks[2]
+                    session_id = _chunks[3]
+                    dh_pubk = _chunks[4]
+                    if self.on_frostreq:
+                        self.on_frostreq(
+                            nick, hostpubkeyhash, sig, session_id, dh_pubk)
                 except (ValueError, IndexError) as e:
-                    log.debug("!frostinit" + repr(e))
+                    log.debug("!frostreq" + repr(e))
                     return
             elif self.check_for_orders(nick, _chunks):
                 pass
@@ -1038,9 +1061,27 @@ class MessageChannel(object):
             _chunks = command.split(" ")
 
             #Decrypt if necessary
-            if _chunks[0] in encrypted_commands:
-                box, encrypt = self.daemon.mcc.get_encryption_box(_chunks[0],
-                                                                  nick)
+            cmd = _chunks[0]
+            if cmd in encrypted_commands:
+                if cmd in ['frostinit', 'frostround1',
+                           'frostagg1', 'frostround2']:
+                    expected_msgs = self.daemon.frost_expected_msgs
+                    if nick in expected_msgs:
+                        if cmd in expected_msgs[nick]:
+                            expected_msg = expected_msgs[nick].pop(cmd)
+                            if not expected_msgs[nick]:
+                                expected_msgs.pop(nick)
+                            if expected_msg:
+                                session_id = expected_msg['session_id']
+                                box, encrypt = \
+                                    self.daemon.mcc.get_encryption_box(
+                                        cmd, nick, extra=session_id)
+                            else:
+                                box = None
+                                encrypt = True
+                else:
+                    box, encrypt = self.daemon.mcc.get_encryption_box(
+                        cmd, nick)
                 if encrypt:
                     if not box:
                         log.debug('error, dont have encryption box object for '
@@ -1161,14 +1202,25 @@ class MessageChannel(object):
                     ext_recovery = _chunks[3]
                     if self.on_dkgcmsg2:
                         self.on_dkgcmsg2(nick, session_id, cmsg2, ext_recovery)
-                elif _chunks[0] == 'frostround1':
+                elif _chunks[0] == 'frostack':
                     hostpubkeyhash = _chunks[1]
-                    session_id = _chunks[2]
-                    sig = _chunks[3]
-                    pub_nonce = _chunks[4]
+                    sig = _chunks[2]
+                    session_id = _chunks[3]
+                    dh_pubk = _chunks[4]
+                    if self.on_frostack:
+                        self.on_frostack(
+                            nick, hostpubkeyhash, sig, session_id, dh_pubk)
+                elif _chunks[0] == 'frostinit':
+                    session_id = _chunks[1]
+                    if self.on_frostinit:
+                        self.on_frostinit(nick, session_id)
+                elif _chunks[0] == 'frostround1':
+                    session_id = _chunks[1]
+                    pubkeyhash = _chunks[2]
+                    pub_nonce = _chunks[3]
                     if self.on_frostround1:
                         self.on_frostround1(
-                            nick, hostpubkeyhash, session_id, sig, pub_nonce)
+                            nick, session_id, pubkeyhash, pub_nonce)
                 elif _chunks[0] == 'frostagg1':
                     session_id = _chunks[1]
                     nonce_agg = _chunks[2]
diff --git a/src/jmdaemon/protocol.py b/src/jmdaemon/protocol.py
index 6c9afd8..72a67b6 100644
--- a/src/jmdaemon/protocol.py
+++ b/src/jmdaemon/protocol.py
@@ -40,17 +40,21 @@ COMMITMENT_PREFIXES = ["P"]
 dkg_public_list = ['dkginit']
 dkg_private_list = ['dkgpmsg1', 'dkgpmsg2', 'dkgcmsg1', 'dkgcmsg2',
                     'dkgfinalized']
-frost_public_list = ['frostinit']
-frost_private_list = ['frostround1', 'frostround2', 'frostagg1']
+
+frost_public_list = ['frostreq']
+frost_plaintext_list = frost_public_list + ['frostack']
+frost_encrypted_list = ['frostinit', 'frostround1',
+                        'frostround2', 'frostagg1']
+
 encrypted_commands = ["auth", "ioauth", "tx", "sig"]
+encrypted_commands += frost_encrypted_list
 plaintext_commands = ["fill", "error", "pubkey", "orderbook", "push"]
 commitment_broadcast_list = ["hp2"]
 plaintext_commands += offername_list
 plaintext_commands += commitment_broadcast_list
 plaintext_commands += dkg_public_list
 plaintext_commands += dkg_private_list
-plaintext_commands += frost_public_list
-plaintext_commands += frost_private_list
+plaintext_commands += frost_plaintext_list
 public_commands = commitment_broadcast_list + [
     "orderbook", "cancel" ] + offername_list + [
     dkg_public_list + frost_public_list]
diff --git a/test/jmclient/test_frost_clients.py b/test/jmclient/test_frost_clients.py
index 4463583..1d18b93 100644
--- a/test/jmclient/test_frost_clients.py
+++ b/test/jmclient/test_frost_clients.py
@@ -627,97 +627,163 @@ class FROSTClientTestCase(DKGClientTestCaseBase):
         self.fc3 = FROSTClient(self.wlt_svc3)
         self.fc4 = FROSTClient(self.wlt_svc4)
 
-    async def test_frost_init(self):
+    async def test_frost_req(self):
         msg_bytes = bytes.fromhex('aabb'*16)
         # test wallet with unknown hostpubkey
-        hostpubkeyhash_hex, session_id, sig_hex = self.fc4.frost_init(
+        hostpubkeyhash_hex, sig_hex, session_id = self.fc4.frost_req(
             self.dkg_session_id, msg_bytes)
         assert hostpubkeyhash_hex is None
-        assert session_id is None
         assert sig_hex  is None
+        assert session_id is None
 
-        hostpubkeyhash_hex, session_id, sig_hex = self.fc1.frost_init(
+        hostpubkeyhash_hex, sig_hex, session_id = self.fc1.frost_req(
             self.dkg_session_id, msg_bytes)
         assert hostpubkeyhash_hex and len(hostpubkeyhash_hex) == 64
-        assert session_id and len(session_id) == 32
         assert sig_hex and len(sig_hex) == 128
+        assert session_id and len(session_id) == 32
 
-    async def test_on_frost_init(self):
+    async def test_on_frost_req(self):
         msg_bytes = bytes.fromhex('aabb'*16)
-        hostpubkeyhash_hex, session_id, sig_hex = self.fc1.frost_init(
+        hostpubkeyhash_hex, sig_hex, session_id = self.fc1.frost_req(
             self.dkg_session_id, msg_bytes)
 
         # fail with wrong pubkeyhash
         hostpubkeyhash4_hex = sha256(self.hostpubkey4).digest()
         (
-            nick1,
+            nick2,
             hostpubkeyhash2_hex,
-            session_id2_hex,
             sig2_hex,
-            pub_nonce
-        ) = self.fc2.on_frost_init(
-            self.nick1, hostpubkeyhash4_hex, session_id, sig_hex)
-        for v in [nick1, hostpubkeyhash2_hex,
-                  session_id2_hex, sig2_hex, pub_nonce]:
+            session_id2_hex,
+        ) = self.fc2.on_frost_req(
+            self.nick1, hostpubkeyhash4_hex, sig_hex, session_id)
+        for v in [nick2, hostpubkeyhash2_hex, sig2_hex, session_id2_hex]:
             assert v is None
 
         # fail with wrong sig
         (
-            nick1,
+            nick2,
             hostpubkeyhash2_hex,
-            session_id2_hex,
             sig2_hex,
-            pub_nonce
-        ) = self.fc2.on_frost_init(
-            self.nick1, hostpubkeyhash_hex, session_id, '01020304'*16)
-        for v in [nick1, hostpubkeyhash2_hex,
-                  session_id2_hex, sig2_hex, pub_nonce]:
+            session_id2_hex,
+        ) = self.fc2.on_frost_req(
+            self.nick1, hostpubkeyhash_hex, '01020304'*16, session_id)
+        for v in [nick2, hostpubkeyhash2_hex, sig2_hex, session_id2_hex]:
             assert v is None
 
         (
-            nick1,
+            nick2,
             hostpubkeyhash2_hex,
+            sig2_hex,
             session_id2_hex,
+        ) = self.fc2.on_frost_req(
+            self.nick1, hostpubkeyhash_hex, sig_hex, session_id)
+        assert nick2 == self.nick1
+        assert hostpubkeyhash2_hex and len(hostpubkeyhash2_hex) == 64
+        assert sig_hex and len(sig_hex) == 128
+        assert session_id2_hex and len(session_id2_hex) == 64
+        assert bytes.fromhex(session_id2_hex) == session_id
+
+        # fail on second call with right params
+        (
+            nick2,
+            hostpubkeyhash2_hex,
+            sig2_hex,
+            session_id2_hex,
+        ) = self.fc2.on_frost_req(
+            self.nick1, hostpubkeyhash_hex, sig_hex, session_id)
+        for v in [nick2, hostpubkeyhash2_hex, sig2_hex, session_id2_hex]:
+            assert v is None
+
+    async def test_on_frost_ack(self):
+        msg_bytes = bytes.fromhex('aabb'*16)
+        hostpubkeyhash_hex, sig_hex, session_id = self.fc1.frost_req(
+            self.dkg_session_id, msg_bytes)
+
+        (
+            nick2,
+            hostpubkeyhash2,
+            sig2_hex,
+            session_id_hex
+        ) = self.fc2.on_frost_req(
+            self.nick1, hostpubkeyhash_hex, sig_hex, session_id)
+
+        # fail with wrong pubkeyhash
+        hostpubkeyhash4_hex = sha256(self.hostpubkey4).digest()
+        assert not self.fc1.on_frost_ack(
+            self.nick4, hostpubkeyhash4_hex, sig2_hex, session_id)
+
+        # fail with wrong sig
+        hostpubkeyhash4_hex = sha256(self.hostpubkey4).digest()
+        assert not self.fc1.on_frost_ack(
+            self.nick2, hostpubkeyhash2, '01020304'*16, session_id)
+
+        assert self.fc1.on_frost_ack(
+            self.nick2, hostpubkeyhash2, sig2_hex, session_id)
+
+    async def test_on_frost_init(self):
+        msg_bytes = bytes.fromhex('aabb'*16)
+        hostpubkeyhash_hex, sig_hex, session_id = self.fc1.frost_req(
+            self.dkg_session_id, msg_bytes)
+
+        (
+            nick2,
+            hostpubkeyhash2,
             sig2_hex,
+            session_id_hex
+        ) = self.fc2.on_frost_req(
+            self.nick1, hostpubkeyhash_hex, sig_hex, session_id)
+
+        assert self.fc1.on_frost_ack(
+            self.nick2, hostpubkeyhash2, sig2_hex, session_id)
+
+        (
+            nick1,
+            session_id2_hex,
+            hostpubkeyhash2_hex,
             pub_nonce
-        ) = self.fc2.on_frost_init(
-            self.nick1, hostpubkeyhash_hex, session_id, sig_hex)
+        ) = self.fc2.on_frost_init(self.nick1, session_id)
         assert nick1 == self.nick1
-        assert hostpubkeyhash2_hex and len(hostpubkeyhash2_hex) == 64
         assert session_id2_hex and len(session_id2_hex) == 64
+        assert hostpubkeyhash2_hex and len(hostpubkeyhash2_hex) == 64
         assert bytes.fromhex(session_id2_hex) == session_id
-        assert sig_hex and len(sig_hex) == 128
         assert pub_nonce and len(pub_nonce) == 66
 
         # fail on second call with right params
         (
             nick1,
-            hostpubkeyhash2_hex,
             session_id2_hex,
-            sig2_hex,
-            pub_nonce
-        ) = self.fc2.on_frost_init(
-            self.nick1, hostpubkeyhash_hex, session_id, sig_hex)
-        for v in [nick1, hostpubkeyhash2_hex,
-                  session_id2_hex, sig2_hex, pub_nonce]:
+            hostpubkeyhash2_hex,
+            pub_nonce2
+        ) = self.fc2.on_frost_init(self.nick1, session_id)
+        print('V'*80, nick1, session_id2_hex, hostpubkeyhash2_hex, pub_nonce2)
+        for v in [nick1, session_id2_hex, hostpubkeyhash2_hex, pub_nonce2]:
             assert v is None
 
     def test_frost_round1(self):
         msg_bytes = bytes.fromhex('aabb'*16)
-        hostpubkeyhash_hex, session_id, sig_hex = self.fc1.frost_init(
+        hostpubkeyhash_hex, sig_hex, session_id = self.fc1.frost_req(
             self.dkg_session_id, msg_bytes)
 
+        (
+            nick2,
+            hostpubkeyhash2,
+            sig2_hex,
+            session_id_hex
+        ) = self.fc2.on_frost_req(
+            self.nick1, hostpubkeyhash_hex, sig_hex, session_id)
+
+        assert self.fc1.on_frost_ack(
+            self.nick2, hostpubkeyhash2, sig2_hex, session_id)
+
         (
             nick1,
-            hostpubkeyhash2_hex,
             session_id2_hex,
-            sig2_hex,
-            pub_nonce
-        ) = self.fc2.on_frost_init(
-            self.nick1, hostpubkeyhash_hex, session_id, sig_hex)
+            hostpubkeyhash2_hex,
+            pub_nonce2
+        ) = self.fc2.on_frost_init(self.nick1, session_id)
 
         # fail with unknown session_id
-        pub_nonce = self.fc2.party_step1(b'\x05'*32)
+        pub_nonce = self.fc2.frost_round1(b'\x05'*32)
         assert pub_nonce is None
 
         # fail with session.sec_nonce already set
@@ -731,26 +797,33 @@ class FROSTClientTestCase(DKGClientTestCaseBase):
 
     def test_on_frost_round1(self):
         msg_bytes = bytes.fromhex('aabb'*16)
-        hostpubkeyhash_hex, session_id, sig_hex = self.fc1.frost_init(
+        hostpubkeyhash_hex, sig_hex, session_id = self.fc1.frost_req(
             self.dkg_session_id, msg_bytes)
 
+        (
+            nick2,
+            hostpubkeyhash2,
+            sig2_hex,
+            session_id_hex
+        ) = self.fc2.on_frost_req(
+            self.nick1, hostpubkeyhash_hex, sig_hex, session_id)
+
+        assert self.fc1.on_frost_ack(
+            self.nick2, hostpubkeyhash2, sig2_hex, session_id)
+
         (
             nick1,
-            hostpubkeyhash2_hex,
             session_id2_hex,
-            sig2_hex,
+            hostpubkeyhash2_hex,
             pub_nonce2
-        ) = self.fc2.on_frost_init(
-            self.nick1, hostpubkeyhash_hex, session_id, sig_hex)
+        ) = self.fc2.on_frost_init(self.nick1, session_id)
 
         (
             nick1,
-            hostpubkeyhash3_hex,
             session_id3_hex,
-            sig3_hex,
+            hostpubkeyhash3_hex,
             pub_nonce3
-        ) = self.fc3.on_frost_init(
-            self.nick1, hostpubkeyhash_hex, session_id, sig_hex)
+        ) = self.fc3.on_frost_init(self.nick1, session_id)
 
         # unknown session_id
         (
@@ -760,8 +833,7 @@ class FROSTClientTestCase(DKGClientTestCaseBase):
             ids,
             msg
         ) = self.fc1.on_frost_round1(
-            self.nick2, hostpubkeyhash2_hex, b'\xaa'*32,
-            sig2_hex, pub_nonce2)
+            self.nick2, b'\xaa'*32, hostpubkeyhash2_hex, pub_nonce2)
         for v in [ready_list, nonce_agg, dkg_session_id, ids, msg]:
             assert v is None
 
@@ -773,19 +845,7 @@ class FROSTClientTestCase(DKGClientTestCaseBase):
             ids,
             msg
         ) = self.fc1.on_frost_round1(
-            self.nick2, 'bb'*32, session_id, sig2_hex, pub_nonce2)
-        for v in [ready_list, nonce_agg, dkg_session_id, ids, msg]:
-            assert v is None
-
-        # wrong sig
-        (
-            ready_list,
-            nonce_agg,
-            dkg_session_id,
-            ids,
-            msg
-        ) = self.fc1.on_frost_round1(
-            self.nick2, hostpubkeyhash2_hex, session_id, '1234'*32, pub_nonce2)
+            self.nick2, session_id, 'bb'*32, pub_nonce2)
         for v in [ready_list, nonce_agg, dkg_session_id, ids, msg]:
             assert v is None
 
@@ -796,8 +856,7 @@ class FROSTClientTestCase(DKGClientTestCaseBase):
             ids,
             msg
         ) = self.fc1.on_frost_round1(
-            self.nick2, hostpubkeyhash2_hex, session_id,
-            sig2_hex, pub_nonce2)
+            self.nick2, session_id, hostpubkeyhash2_hex, pub_nonce2)
         assert ready_list == set([self.nick2])
         assert nonce_agg and len(nonce_agg)== 66
         assert dkg_session_id and dkg_session_id == self.dkg_session_id
@@ -812,23 +871,32 @@ class FROSTClientTestCase(DKGClientTestCaseBase):
             ids,
             msg
         ) = self.fc1.on_frost_round1(
-            self.nick3, hostpubkeyhash3_hex, session_id, sig3_hex, pub_nonce3)
+            self.nick3, session_id, hostpubkeyhash3_hex, pub_nonce3)
         for v in [ready_list, nonce_agg, dkg_session_id, ids, msg]:
             assert v is None
 
     def test_frost_agg1(self):
         msg_bytes = bytes.fromhex('aabb'*16)
-        hostpubkeyhash_hex, session_id, sig_hex = self.fc1.frost_init(
+        hostpubkeyhash_hex, sig_hex, session_id = self.fc1.frost_req(
             self.dkg_session_id, msg_bytes)
 
+        (
+            nick2,
+            hostpubkeyhash2,
+            sig2_hex,
+            session_id_hex
+        ) = self.fc2.on_frost_req(
+            self.nick1, hostpubkeyhash_hex, sig_hex, session_id)
+
+        assert self.fc1.on_frost_ack(
+            self.nick2, hostpubkeyhash2, sig2_hex, session_id)
+
         (
             nick1,
-            hostpubkeyhash2_hex,
             session_id2_hex,
-            sig2_hex,
+            hostpubkeyhash2_hex,
             pub_nonce2
-        ) = self.fc2.on_frost_init(
-            self.nick1, hostpubkeyhash_hex, session_id, sig_hex)
+        ) = self.fc2.on_frost_init(self.nick1, session_id)
 
         (
             ready_list,
@@ -837,8 +905,7 @@ class FROSTClientTestCase(DKGClientTestCaseBase):
             ids,
             msg
         ) = self.fc1.on_frost_round1(
-            self.nick2, hostpubkeyhash2_hex, session_id,
-            sig2_hex, pub_nonce2)
+            self.nick2, session_id, hostpubkeyhash2_hex, pub_nonce2)
 
         # fail on unknown session_id
         (
@@ -875,17 +942,26 @@ class FROSTClientTestCase(DKGClientTestCaseBase):
 
     def test_frost_round2(self):
         msg_bytes = bytes.fromhex('aabb'*16)
-        hostpubkeyhash_hex, session_id, sig_hex = self.fc1.frost_init(
+        hostpubkeyhash_hex, sig_hex, session_id = self.fc1.frost_req(
             self.dkg_session_id, msg_bytes)
 
+        (
+            nick2,
+            hostpubkeyhash2,
+            sig2_hex,
+            session_id_hex
+        ) = self.fc2.on_frost_req(
+            self.nick1, hostpubkeyhash_hex, sig_hex, session_id)
+
+        assert self.fc1.on_frost_ack(
+            self.nick2, hostpubkeyhash2, sig2_hex, session_id)
+
         (
             nick1,
-            hostpubkeyhash2_hex,
             session_id2_hex,
-            sig2_hex,
+            hostpubkeyhash2_hex,
             pub_nonce2
-        ) = self.fc2.on_frost_init(
-            self.nick1, hostpubkeyhash_hex, session_id, sig_hex)
+        ) = self.fc2.on_frost_init(self.nick1, session_id)
 
         (
             ready_list,
@@ -894,8 +970,7 @@ class FROSTClientTestCase(DKGClientTestCaseBase):
             ids,
             msg
         ) = self.fc1.on_frost_round1(
-            self.nick2, hostpubkeyhash2_hex, session_id,
-            sig2_hex, pub_nonce2)
+            self.nick2, session_id, hostpubkeyhash2_hex, pub_nonce2)
 
         # fail on unknown session_id
         partial_sig = self.fc2.frost_round2(
@@ -916,17 +991,26 @@ class FROSTClientTestCase(DKGClientTestCaseBase):
 
     def test_on_frost_round2(self):
         msg_bytes = bytes.fromhex('aabb'*16)
-        hostpubkeyhash_hex, session_id, sig_hex = self.fc1.frost_init(
+        hostpubkeyhash_hex, sig_hex, session_id = self.fc1.frost_req(
             self.dkg_session_id, msg_bytes)
 
+        (
+            nick2,
+            hostpubkeyhash2,
+            sig2_hex,
+            session_id_hex
+        ) = self.fc2.on_frost_req(
+            self.nick1, hostpubkeyhash_hex, sig_hex, session_id)
+
+        assert self.fc1.on_frost_ack(
+            self.nick2, hostpubkeyhash2, sig2_hex, session_id)
+
         (
             nick1,
-            hostpubkeyhash2_hex,
             session_id2_hex,
-            sig2_hex,
+            hostpubkeyhash2_hex,
             pub_nonce2
-        ) = self.fc2.on_frost_init(
-            self.nick1, hostpubkeyhash_hex, session_id, sig_hex)
+        ) = self.fc2.on_frost_init(self.nick1, session_id)
 
         (
             ready_list,
@@ -935,8 +1019,7 @@ class FROSTClientTestCase(DKGClientTestCaseBase):
             ids,
             msg
         ) = self.fc1.on_frost_round1(
-            self.nick2, hostpubkeyhash2_hex, session_id,
-            sig2_hex, pub_nonce2)
+            self.nick2, session_id, hostpubkeyhash2_hex, pub_nonce2)
 
         partial_sig = self.fc2.frost_round2(
             session_id, nonce_agg, self.dkg_session_id, ids, msg)
diff --git a/test/jmclient/test_frost_ipc.py b/test/jmclient/test_frost_ipc.py
index 6ea5b0f..bc975a7 100644
--- a/test/jmclient/test_frost_ipc.py
+++ b/test/jmclient/test_frost_ipc.py
@@ -170,43 +170,62 @@ class DummyFrostJMClientProtocol:
         log.debug(f'Coordinator get dkgfinalized')
         client.on_dkg_finalized(nick, session_id)
 
-    def frost_init(self, dkg_session_id, msg_bytes):
-        log.debug(f'Coordinator call frost_init')
+    def frost_req(self, dkg_session_id, msg_bytes):
+        log.debug(f'Coordinator call frost_req')
         client = self.factory.client
-        hostpubkeyhash, session_id, sig = client.frost_init(
+        hostpubkeyhash, sig, session_id = client.frost_req(
             dkg_session_id, msg_bytes)
         coordinator = client.frost_coordinators.get(session_id)
         session = client.frost_sessions.get(session_id)
         if session_id and session and coordinator:
-            coordinator.frost_init_sec = time.time()
+            coordinator.frost_req_sec = time.time()
             for _, pc in self.party_clients.items():
 
-                async def on_frost_init(pc, nick, hostpubkeyhash,
-                                        session_id, sig):
-                    await pc.on_frost_init(
-                        nick, hostpubkeyhash, session_id, sig)
+                async def on_frost_req(pc, nick, hostpubkeyhash,
+                                       sig, session_id):
+                    await pc.on_frost_req(
+                        nick, hostpubkeyhash, sig, session_id)
 
-                asyncio.create_task(on_frost_init(
-                    pc, self.nick, hostpubkeyhash, session_id, sig))
+                asyncio.create_task(on_frost_req(
+                    pc, self.nick, hostpubkeyhash, sig, session_id))
         return session_id, coordinator, session
 
-    async def on_frost_init(self, nick, hostpubkeyhash, session_id, sig):
+    async def on_frost_req(self, nick, hostpubkeyhash, sig, session_id):
         client = self.factory.client
         (
-            nick,
+            nick2,
             hostpubkeyhash,
-            session_id,
             sig,
+            session_id,
+        ) = client.on_frost_req(nick, hostpubkeyhash, sig, session_id)
+        if sig:
+            pc = self.party_clients[nick]
+            session_id = bytes.fromhex(session_id)
+            await pc.on_frost_ack(
+                self.nick, hostpubkeyhash, sig, session_id)
+
+    async def on_frost_ack(self, nick, hostpubkeyhash, sig, session_id):
+        client = self.factory.client
+        assert client.on_frost_ack(nick, hostpubkeyhash, sig, session_id)
+        pc = self.party_clients[nick]
+        await pc.on_frost_init(self.nick, session_id)
+
+    async def on_frost_init(self, nick, session_id):
+        client = self.factory.client
+        (
+            nick2,
+            session_id,
+            hostpubkeyhash,
             pub_nonce
-        ) = client.on_frost_init(nick, hostpubkeyhash, session_id, sig)
+        ) = client.on_frost_init(nick, session_id)
         if pub_nonce:
             pc = self.party_clients[nick]
             session_id = bytes.fromhex(session_id)
             await pc.on_frost_round1(
-                self.nick, hostpubkeyhash, session_id, sig, pub_nonce)
+                self.nick, session_id, hostpubkeyhash, pub_nonce)
 
-    async def on_frost_round1(self, nick, hostpubkeyhash,
-                              session_id, sig, pub_nonce):
+    async def on_frost_round1(self, nick, session_id,
+                              hostpubkeyhash, pub_nonce):
         client = self.factory.client
         (
             ready_nicks,
@@ -215,19 +234,14 @@ class DummyFrostJMClientProtocol:
             ids,
             msg
         ) = client.on_frost_round1(
-            nick, hostpubkeyhash, session_id, sig, pub_nonce)
+            nick, session_id, hostpubkeyhash, pub_nonce)
         if ready_nicks and nonce_agg:
             for party_nick in ready_nicks:
                 pc = self.party_clients[nick]
-                self.frost_agg1(pc, self.nick, session_id, nonce_agg,
-                                dkg_session_id, ids, msg)
-
-    def frost_agg1(self, pc, nick, session_id,
-                   nonce_agg, dkg_session_id, ids, msg):
-        pc.on_frost_agg1(
-            self.nick, session_id, nonce_agg, dkg_session_id, ids, msg)
+                await pc.on_frost_agg1(
+                    self.nick, session_id, nonce_agg, dkg_session_id, ids, msg)
 
-    def on_frost_agg1(self, nick, session_id,
+    async def on_frost_agg1(self, nick, session_id,
                       nonce_agg, dkg_session_id, ids, msg):
         client = self.factory.client
         session = client.frost_sessions.get(session_id)
@@ -239,11 +253,11 @@ class DummyFrostJMClientProtocol:
                 session_id, nonce_agg, dkg_session_id, ids, msg)
             if partial_sig:
                 pc = self.party_clients[nick]
-                pc.on_frost_round2(self.nick, session_id, partial_sig)
+                await pc.on_frost_round2(self.nick, session_id, partial_sig)
         else:
             log.error(f'on_frost_agg1: not coordinator nick {nick}')
 
-    def on_frost_round2(self, nick, session_id, partial_sig):
+    async def on_frost_round2(self, nick, session_id, partial_sig):
         client = self.factory.client
         sig = client.on_frost_round2(nick, session_id, partial_sig)
         if sig:
@@ -333,9 +347,10 @@ class FrostIPCClientTestCase(FrostIPCTestCaseBase):
         pubkeys = list(dkg._dkg_pubkey.values())
         assert pubkey and pubkey in pubkeys
 
-    async def test_frost_sign(self):
+    async def test_frost_req(self):
         sighash = bytes.fromhex('01020304'*8)
-        sig, pubkey, tweaked_pubkey = await self.ipcc.frost_sign(0, 0, 0, sighash)
+        sig, pubkey, tweaked_pubkey = await self.ipcc.frost_req(
+            0, 0, 0, sighash)
         assert sig and len(sig) == 64
         assert pubkey and len(pubkey) == 33
         assert tweaked_pubkey and len(tweaked_pubkey) == 33