diff --git a/.travis.yml b/.travis.yml
index bc4cf2e04..490c9d6bb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -46,9 +46,10 @@ install:
       }"
   - export PATH=$PWD/nim/$NIMVER/bin:$GOPATH/bin:$PATH
   - go version
-  - go get -v github.com/libp2p/go-libp2p-daemon
-  - cd $GOPATH/src/github.com/libp2p/go-libp2p-daemon
-  - make
+  - git clone https://github.com/libp2p/go-libp2p-daemon
+  - cd go-libp2p-daemon
+  - git checkout v0.0.1
+  - go install ./...
   - cd $HOME/build/status-im/nim-libp2p
 
 script:
diff --git a/libp2p/crypto/crypto.nim b/libp2p/crypto/crypto.nim
index 39cc23f12..08bf191b1 100644
--- a/libp2p/crypto/crypto.nim
+++ b/libp2p/crypto/crypto.nim
@@ -8,11 +8,13 @@
 ## those terms.
 
 ## This module implements Public Key and Private Key interface for libp2p.
-import rsa, ecnist
-import ed25519/ed25519
-import ../protobuf/minprotobuf
+import rsa, ecnist, ed25519/ed25519
+import ../protobuf/minprotobuf, ../vbuffer
 import nimcrypto/[rijndael, blowfish, sha, sha2, hash, hmac, utils]
 
+# This is workaround for Nim's `import` bug
+export rijndael, blowfish, sha, sha2, hash, hmac, utils
+
 type
   PKScheme* = enum
     RSA = 0,
@@ -69,7 +71,11 @@ type
     macsize*: int
     data*: seq[byte]
 
+  Signature* = object
+    data*: seq[byte]
+
   P2pKeyError* = object of Exception
+  P2pSigError* = object of Exception
 
 const
   SupportedSchemes* = {RSA, Ed25519, ECDSA}
@@ -192,6 +198,14 @@ proc toBytes*(key: PublicKey, data: var openarray[byte]): int =
   if len(data) >= result:
     copyMem(addr data[0], addr msg.buffer[0], len(msg.buffer))
 
+proc toBytes*(sig: Signature, data: var openarray[byte]): int =
+  ## Serialize signature ``sig`` and store it to ``data``.
+  ##
+  ## Returns number of bytes (octets) needed to store signature ``sig``.
+  result = len(sig.data)
+  if len(data) >= result:
+    copyMem(addr data[0], unsafeAddr sig.data[0], len(sig.data))
+
 proc getBytes*(key: PrivateKey): seq[byte] =
   ## Return private key ``key`` in binary form (using libp2p's protobuf
   ## serialization).
@@ -210,6 +224,10 @@ proc getBytes*(key: PublicKey): seq[byte] =
   msg.finish()
   result = msg.buffer
 
+proc getBytes*(sig: Signature): seq[byte] =
+  ## Return signature ``sig`` in binary form.
+  result = sig.data
+
 proc init*(key: var PrivateKey, data: openarray[byte]): bool =
   ## Initialize private key ``key`` from libp2p's protobuf serialized raw
   ## binary form.
@@ -264,6 +282,14 @@ proc init*(key: var PublicKey, data: openarray[byte]): bool =
               key = nkey
               result = true
 
+proc init*(sig: var Signature, data: openarray[byte]): bool =
+  ## Initialize signature ``sig`` from raw binary form.
+  ##
+  ## Returns ``true`` on success.
+  if len(data) > 0:
+    sig.data = @data
+    result = true
+
 proc init*(key: var PrivateKey, data: string): bool =
   ## Initialize private key ``key`` from libp2p's protobuf serialized
   ## hexadecimal string representation.
@@ -278,6 +304,13 @@ proc init*(key: var PublicKey, data: string): bool =
   ## Returns ``true`` on success.
   result = key.init(fromHex(data))
 
+proc init*(sig: var Signature, data: string): bool =
+  ## Initialize signature ``sig`` from serialized hexadecimal string
+  ## representation.
+  ##
+  ## Returns ``true`` on success.
+  result = sig.init(fromHex(data))
+
 proc init*(t: typedesc[PrivateKey], data: openarray[byte]): PrivateKey =
   ## Create new private key from libp2p's protobuf serialized binary form.
   if not result.init(data):
@@ -288,6 +321,11 @@ proc init*(t: typedesc[PublicKey], data: openarray[byte]): PublicKey =
   if not result.init(data):
     raise newException(P2pKeyError, "Incorrect binary form")
 
+proc init*(t: typedesc[Signature], data: openarray[byte]): Signature =
+  ## Create new public key from libp2p's protobuf serialized binary form.
+  if not result.init(data):
+    raise newException(P2pSigError, "Incorrect binary form")
+
 proc init*(t: typedesc[PrivateKey], data: string): PrivateKey =
   ## Create new private key from libp2p's protobuf serialized hexadecimal string
   ## form.
@@ -298,6 +336,10 @@ proc init*(t: typedesc[PublicKey], data: string): PublicKey =
   ## form.
   result = t.init(fromHex(data))
 
+proc init*(t: typedesc[Signature], data: string): Signature =
+  ## Create new signature from serialized hexadecimal string form.
+  result = t.init(fromHex(data))
+
 proc `==`*(key1, key2: PublicKey): bool =
   ## Return ``true`` if two public keys ``key1`` and ``key2`` of the same
   ## scheme and equal.
@@ -346,34 +388,38 @@ proc `$`*(key: PublicKey): string =
     result.add($(key.eckey))
     result.add(")")
 
-proc sign*(key: PrivateKey, data: openarray[byte]): seq[byte] =
+proc `$`*(sig: Signature): string =
+  ## Get string representation of signature ``sig``.
+  result = toHex(sig.data)
+
+proc sign*(key: PrivateKey, data: openarray[byte]): Signature =
   ## Sign message ``data`` using private key ``key`` and return generated
   ## signature in raw binary form.
   if key.scheme == RSA:
     var sig = key.rsakey.sign(data)
-    result = sig.getBytes()
+    result.data = sig.getBytes()
   elif key.scheme == Ed25519:
     var sig = key.edkey.sign(data)
-    result = sig.getBytes()
+    result.data = sig.getBytes()
   elif key.scheme == ECDSA:
     var sig = key.eckey.sign(data)
-    result = sig.getBytes()
+    result.data = sig.getBytes()
 
-proc verify*(sig: openarray[byte], message: openarray[byte],
+proc verify*(sig: Signature, message: openarray[byte],
              key: PublicKey): bool =
   ## Verify signature ``sig`` using message ``message`` and public key ``key``.
   ## Return ``true`` if message signature is valid.
   if key.scheme == RSA:
     var signature: RsaSignature
-    if signature.init(sig) == Asn1Status.Success:
+    if signature.init(sig.data) == Asn1Status.Success:
       result = signature.verify(message, key.rsakey)
   elif key.scheme == Ed25519:
     var signature: EdSignature
-    if signature.init(sig):
+    if signature.init(sig.data):
       result = signature.verify(message, key.edkey)
   elif key.scheme == ECDSA:
     var signature: EcSignature
-    if signature.init(sig) == Asn1Status.Success:
+    if signature.init(sig.data) == Asn1Status.Success:
       result = signature.verify(message, key.eckey)
 
 template makeSecret(buffer, hmactype, secret, seed) =
@@ -485,3 +531,62 @@ proc makeSecret*(remoteEPublic: PublicKey, localEPrivate: PrivateKey,
   if remoteEPublic.scheme == ECDSA:
     if localEPrivate.scheme == remoteEPublic.scheme:
       result = toSecret(remoteEPublic.eckey, localEPrivate.eckey, data)
+
+## Serialization/Deserialization helpers
+
+proc write*(vb: var VBuffer, pubkey: PublicKey) {.inline.} =
+  ## Write PublicKey value ``pubkey`` to buffer ``vb``.
+  vb.writeSeq(pubkey.getBytes())
+
+proc write*(vb: var VBuffer, seckey: PrivateKey) {.inline.} =
+  ## Write PrivateKey value ``seckey`` to buffer ``vb``.
+  vb.writeSeq(seckey.getBytes())
+
+proc write*(vb: var VBuffer, sig: PrivateKey) {.inline.} =
+  ## Write Signature value ``sig`` to buffer ``vb``.
+  vb.writeSeq(sig.getBytes())
+
+proc initProtoField*(index: int, pubkey: PublicKey): ProtoField =
+  ## Initialize ProtoField with PublicKey ``pubkey``.
+  result = initProtoField(index, pubkey.getBytes())
+
+proc initProtoField*(index: int, seckey: PrivateKey): ProtoField =
+  ## Initialize ProtoField with PrivateKey ``seckey``.
+  result = initProtoField(index, seckey.getBytes())
+
+proc initProtoField*(index: int, sig: Signature): ProtoField =
+  ## Initialize ProtoField with Signature ``sig``.
+  result = initProtoField(index, sig.getBytes())
+
+proc getValue*(data: var ProtoBuffer, field: int, value: var PublicKey): int =
+  ## Read ``PublicKey`` from ProtoBuf's message and validate it.
+  var buf: seq[byte]
+  var key: PublicKey
+  result = getLengthValue(data, field, buf)
+  if result > 0:
+    if not key.init(buf):
+      result = -1
+    else:
+      value = key
+
+proc getValue*(data: var ProtoBuffer, field: int, value: var PrivateKey): int =
+  ## Read ``PrivateKey`` from ProtoBuf's message and validate it.
+  var buf: seq[byte]
+  var key: PrivateKey
+  result = getLengthValue(data, field, buf)
+  if result > 0:
+    if not key.init(buf):
+      result = -1
+    else:
+      value = key
+
+proc getValue*(data: var ProtoBuffer, field: int, value: var Signature): int =
+  ## Read ``Signature`` from ProtoBuf's message and validate it.
+  var buf: seq[byte]
+  var sig: Signature
+  result = getLengthValue(data, field, buf)
+  if result > 0:
+    if not sig.init(buf):
+      result = -1
+    else:
+      value = sig
diff --git a/libp2p/crypto/ed25519/ed25519.nim b/libp2p/crypto/ed25519/ed25519.nim
index 7d842c6b7..280cf07ab 100644
--- a/libp2p/crypto/ed25519/ed25519.nim
+++ b/libp2p/crypto/ed25519/ed25519.nim
@@ -14,7 +14,33 @@ import constants
 import nimcrypto/[hash, sha2, sysrand, utils]
 
 # This workaround needed because of some bugs in Nim Static[T].
-export sha2
+export hash, sha2
+
+const
+  EdPrivateKeySize* = 64
+    ## Size in octets (bytes) of serialized ED25519 private key.
+  EdPublicKeySize* = 32
+    ## Size in octets (bytes) of serialized ED25519 public key.
+  EdSignatureSize* = 64
+    ## Size in octets (bytes) of serialized ED25519 signature.
+
+type
+  EdPrivateKey* = object
+    data*: array[EdPrivateKeySize, byte]
+
+  EdPublicKey* = object
+    data*: array[EdPublicKeySize, byte]
+
+  EdSignature* = object
+    data*: array[EdSignatureSize, byte]
+
+  EdKeyPair* = object
+    seckey*: EdPrivateKey
+    pubkey*: EdPublicKey
+
+  EdError* = object of Exception
+  EdRngError* = object of EdError
+  EdIncorrectError* = object of EdError
 
 proc `-`(x: uint32): uint32 {.inline.} =
   result = (0xFFFF_FFFF'u32 - x) + 1'u32
@@ -1612,32 +1638,6 @@ proc checkScalar*(scalar: openarray[byte]): uint32 =
     c = -1
   result = NEQ(z, 0'u32) and LT0(c)
 
-const
-  EdPrivateKeySize* = 64
-    ## Size in octets (bytes) of serialized ED25519 private key.
-  EdPublicKeySize* = 32
-    ## Size in octets (bytes) of serialized ED25519 public key.
-  EdSignatureSize* = 64
-    ## Size in octets (bytes) of serialized ED25519 signature.
-
-type
-  EdPrivateKey* = object
-    data*: array[EdPrivateKeySize, byte]
-
-  EdPublicKey* = object
-    data*: array[EdPublicKeySize, byte]
-
-  EdSignature* = object
-    data*: array[EdSignatureSize, byte]
-
-  EdKeyPair* = object
-    seckey*: EdPrivateKey
-    pubkey*: EdPublicKey
-
-  EdError* = object of Exception
-  EdRngError* = object of EdError
-  EdIncorrectError* = object of EdError
-
 proc random*(t: typedesc[EdPrivateKey]): EdPrivateKey =
   ## Generate new random ED25519 private key using OS specific CSPRNG.
   var
@@ -1645,11 +1645,11 @@ proc random*(t: typedesc[EdPrivateKey]): EdPrivateKey =
     pk: array[EdPublicKeySize, byte]
   if randomBytes(result.data.toOpenArray(0, 31)) != 32:
     raise newException(EdRngError, "Could not generate random data")
-  var hash = sha512.digest(result.data.toOpenArray(0, 31))
-  hash.data[0] = hash.data[0] and 0xF8'u8
-  hash.data[31] = hash.data[31] and 0x3F'u8
-  hash.data[31] = hash.data[31] or 0x40'u8
-  geScalarMultBase(point, hash.data)
+  var hh = sha512.digest(result.data.toOpenArray(0, 31))
+  hh.data[0] = hh.data[0] and 0xF8'u8
+  hh.data[31] = hh.data[31] and 0x3F'u8
+  hh.data[31] = hh.data[31] or 0x40'u8
+  geScalarMultBase(point, hh.data)
   geP3ToBytes(pk, point)
   copyMem(addr result.data[32], addr pk[0], 32)
 
@@ -1659,11 +1659,11 @@ proc random*(t: typedesc[EdKeyPair]): EdKeyPair =
   var point: GeP3
   if randomBytes(result.seckey.data.toOpenArray(0, 31)) != 32:
     raise newException(EdRngError, "Could not generate random data")
-  var hash = sha512.digest(result.seckey.data.toOpenArray(0, 31))
-  hash.data[0] = hash.data[0] and 0xF8'u8
-  hash.data[31] = hash.data[31] and 0x3F'u8
-  hash.data[31] = hash.data[31] or 0x40'u8
-  geScalarMultBase(point, hash.data)
+  var hh = sha512.digest(result.seckey.data.toOpenArray(0, 31))
+  hh.data[0] = hh.data[0] and 0xF8'u8
+  hh.data[31] = hh.data[31] and 0x3F'u8
+  hh.data[31] = hh.data[31] or 0x40'u8
+  geScalarMultBase(point, hh.data)
   geP3ToBytes(result.pubkey.data, point)
   copyMem(addr result.seckey.data[32], addr result.pubkey.data[0], 32)
 
diff --git a/libp2p/daemon/daemonapi.nim b/libp2p/daemon/daemonapi.nim
index 9b97e109b..3e36dc8f8 100644
--- a/libp2p/daemon/daemonapi.nim
+++ b/libp2p/daemon/daemonapi.nim
@@ -12,8 +12,9 @@ import os, osproc, strutils, tables, streams, strtabs
 import chronos
 import ../varint, ../multiaddress, ../multicodec, ../base58, ../cid, ../peer
 import ../wire, ../multihash, ../protobuf/minprotobuf
+import ../crypto/crypto
 
-export peer, multiaddress, multicodec, multihash, cid
+export peer, multiaddress, multicodec, multihash, cid, crypto
 
 when not defined(windows):
   import posix
@@ -78,9 +79,7 @@ type
     VALUE = 1,
     END = 2
 
-  # PeerID* = seq[byte]
   MultiProtocol* = string
-  LibP2PPublicKey* = seq[byte]
   DHTValue* = seq[byte]
 
   P2PStreamFlags* {.pure.} = enum
@@ -137,8 +136,8 @@ type
     data*: seq[byte]
     seqno*: seq[byte]
     topics*: seq[string]
-    signature*: seq[byte]
-    key*: seq[byte]
+    signature*: Signature
+    key*: PublicKey
 
   P2PStreamCallback* = proc(api: DaemonAPI,
                             stream: P2PStream): Future[void] {.gcsafe.}
@@ -662,7 +661,7 @@ proc newDaemonApi*(flags: set[P2PDaemonFlags] = {},
     raise newException(DaemonLocalError, "Could not find daemon executable!")
 
   # Starting daemon process
-  echo "Starting ", cmd, " ", args.join(" ")
+  # echo "Starting ", cmd, " ", args.join(" ")
   api.process = startProcess(cmd, "", args, env, {poStdErrToStdOut})
   # Waiting until daemon will not be bound to control socket.
   while true:
@@ -928,6 +927,10 @@ proc dhtGetSingleValue(pb: var ProtoBuffer): seq[byte] =
   if pb.getLengthValue(3, result) == -1:
     raise newException(DaemonLocalError, "Missing field `value`!")
 
+proc dhtGetSinglePublicKey(pb: var ProtoBuffer): PublicKey =
+  if pb.getValue(3, result) == -1:
+    raise newException(DaemonLocalError, "Missing field `value`!")
+
 proc dhtGetSinglePeerID(pb: var ProtoBuffer): PeerID =
   if pb.getValue(3, result) == -1:
     raise newException(DaemonLocalError, "Missing field `value`!")
@@ -975,7 +978,7 @@ proc dhtFindPeer*(api: DaemonAPI, peer: PeerID,
     await api.closeConnection(transp)
 
 proc dhtGetPublicKey*(api: DaemonAPI, peer: PeerID,
-                      timeout = 0): Future[LibP2PPublicKey] {.async.} =
+                      timeout = 0): Future[PublicKey] {.async.} =
   ## Get peer's public key from peer with id ``peer``.
   ##
   ## You can specify timeout for DHT request with ``timeout`` value. ``0`` value
@@ -985,7 +988,7 @@ proc dhtGetPublicKey*(api: DaemonAPI, peer: PeerID,
     var pb = await transp.transactMessage(requestDHTGetPublicKey(peer, timeout))
     withMessage(pb) do:
       pb.enterDhtMessage(DHTResponseType.VALUE)
-      result = pb.dhtGetSingleValue()
+      result = pb.dhtGetSinglePublicKey()
   finally:
     await api.closeConnection(transp)
 
@@ -1178,8 +1181,6 @@ proc pubsubPublish*(api: DaemonAPI, topic: string,
 proc getPubsubMessage*(pb: var ProtoBuffer): PubSubMessage =
   result.data = newSeq[byte]()
   result.seqno = newSeq[byte]()
-  result.signature = newSeq[byte]()
-  result.key = newSeq[byte]()
   discard pb.getValue(1, result.peer)
   discard pb.getBytes(2, result.data)
   discard pb.getBytes(3, result.seqno)
@@ -1193,8 +1194,8 @@ proc getPubsubMessage*(pb: var ProtoBuffer): PubSubMessage =
       result.topics = newSeq[string]()
     result.topics.add(stritem)
     item.setLen(0)
-  discard pb.getBytes(5, result.signature)
-  discard pb.getBytes(6, result.key)
+  discard pb.getValue(5, result.signature)
+  discard pb.getValue(6, result.key)
 
 proc pubsubLoop(api: DaemonAPI, ticket: PubsubTicket) {.async.} =
   while true:
diff --git a/libp2p/multihash.nim b/libp2p/multihash.nim
index 0b6d7e08e..6b4311eb4 100644
--- a/libp2p/multihash.nim
+++ b/libp2p/multihash.nim
@@ -24,6 +24,9 @@ import tables
 import nimcrypto/[sha, sha2, keccak, blake2, hash, utils]
 import varint, vbuffer, base58, multicodec, multibase
 
+# This is workaround for Nim `import` bug.
+export sha, sha2, keccak, blake2, hash, utils
+
 const
   MaxHashSize* = 128
 
diff --git a/tests/testcrypto.nim b/tests/testcrypto.nim
index 65fc8dd2a..5f13a9007 100644
--- a/tests/testcrypto.nim
+++ b/tests/testcrypto.nim
@@ -342,9 +342,6 @@ const
     "FA5CB0689A1DFDBAE8618BC079D70E318377B0DA"
   ]
 
-
-
-
 proc cmp(a, b: openarray[byte]): bool =
   result = (@a == @b)
 
@@ -390,6 +387,70 @@ suite "Key interface test suite":
         toHex(checkseckey) == stripSpaces(PrivateKeys[i])
         toHex(checkpubkey) == stripSpaces(PublicKeys[i])
 
+  test "Generate/Sign/Serialize/Deserialize/Verify test":
+    var msg = "message to sign"
+    var bmsg = cast[seq[byte]](msg)
+
+    for i in 0..<5:
+      var seckey = PrivateKey.random(ECDSA)
+      var pubkey = seckey.getKey()
+      var pair = KeyPair.random(ECDSA)
+      var sig1 = pair.seckey.sign(bmsg)
+      var sig2 = seckey.sign(bmsg)
+      var sersig1 = sig1.getBytes()
+      var sersig2 = sig2.getBytes()
+      var serpub1 = pair.pubkey.getBytes()
+      var serpub2 = pubkey.getBytes()
+      var recsig1 = Signature.init(sersig1)
+      var recsig2 = Signature.init(sersig2)
+      var recpub1 = PublicKey.init(serpub1)
+      var recpub2 = PublicKey.init(serpub2)
+      check:
+        sig1.verify(bmsg, pair.pubkey) == true
+        recsig1.verify(bmsg, recpub1) == true
+        sig2.verify(bmsg, pubkey) == true
+        recsig2.verify(bmsg, recpub2) == true
+
+    for i in 0..<5:
+      var seckey = PrivateKey.random(Ed25519)
+      var pubkey = seckey.getKey()
+      var pair = KeyPair.random(Ed25519)
+      var sig1 = pair.seckey.sign(bmsg)
+      var sig2 = seckey.sign(bmsg)
+      var sersig1 = sig1.getBytes()
+      var sersig2 = sig2.getBytes()
+      var serpub1 = pair.pubkey.getBytes()
+      var serpub2 = pubkey.getBytes()
+      var recsig1 = Signature.init(sersig1)
+      var recsig2 = Signature.init(sersig2)
+      var recpub1 = PublicKey.init(serpub1)
+      var recpub2 = PublicKey.init(serpub2)
+      check:
+        sig1.verify(bmsg, pair.pubkey) == true
+        recsig1.verify(bmsg, recpub1) == true
+        sig2.verify(bmsg, pubkey) == true
+        recsig2.verify(bmsg, recpub2) == true
+
+    for i in 0..<5:
+      var seckey = PrivateKey.random(RSA, 512)
+      var pubkey = seckey.getKey()
+      var pair = KeyPair.random(RSA, 512)
+      var sig1 = pair.seckey.sign(bmsg)
+      var sig2 = seckey.sign(bmsg)
+      var sersig1 = sig1.getBytes()
+      var sersig2 = sig2.getBytes()
+      var serpub1 = pair.pubkey.getBytes()
+      var serpub2 = pubkey.getBytes()
+      var recsig1 = Signature.init(sersig1)
+      var recsig2 = Signature.init(sersig2)
+      var recpub1 = PublicKey.init(serpub1)
+      var recpub2 = PublicKey.init(serpub2)
+      check:
+        sig1.verify(bmsg, pair.pubkey) == true
+        recsig1.verify(bmsg, recpub1) == true
+        sig2.verify(bmsg, pubkey) == true
+        recsig2.verify(bmsg, recpub2) == true
+
   test "Go key stretch function AES128-SHA256 test vectors":
     check testStretcher(0, 4, Aes128, Sha256) == true
   test "Go key stretch function AES256-SHA512 test vectors":