diff --git a/src/NewcoinAddress.cpp b/src/NewcoinAddress.cpp
index f09a45789..47b064baf 100644
--- a/src/NewcoinAddress.cpp
+++ b/src/NewcoinAddress.cpp
@@ -137,6 +137,31 @@ void NewcoinAddress::setNodePublic(const std::vector<unsigned char>& vPublic)
     SetData(VER_NODE_PUBLIC, vPublic);
 }
 
+bool NewcoinAddress::verifyNodePublic(const uint256& hash, const std::vector<unsigned char>& vchSig) const
+{
+	CKey	pubkey	= CKey();
+	bool	bVerified;
+
+	if (!pubkey.SetPubKey(getNodePublic()))
+	{
+		// Failed to set public key.
+		bVerified	= false;
+	}
+	else
+	{
+		bVerified	= pubkey.Verify(hash, vchSig);
+	}
+
+	return bVerified;
+}
+
+bool NewcoinAddress::verifyNodePublic(const uint256& hash, const std::string& strSig) const
+{
+	std::vector<unsigned char> vchSig(strSig.begin(), strSig.end());
+
+	return verifyNodePublic(hash, vchSig);
+}
+
 //
 // NodePrivate
 //
@@ -197,6 +222,17 @@ void NewcoinAddress::setNodePrivate(uint256 hash256)
     SetData(VER_NODE_PRIVATE, hash256.begin(), 32);
 }
 
+void NewcoinAddress::signNodePrivate(const uint256& hash, std::vector<unsigned char>& vchSig) const
+{
+	CKey	privkey	= CKey();
+
+	if (!privkey.SetSecret(getNodePrivateData()))
+		throw std::runtime_error("SetSecret failed.");
+
+	if (!privkey.Sign(hash, vchSig))
+		throw std::runtime_error("Signing failed.");
+}
+
 //
 // AccountID
 //
diff --git a/src/NewcoinAddress.h b/src/NewcoinAddress.h
index 8a560d49b..e07d510f6 100644
--- a/src/NewcoinAddress.h
+++ b/src/NewcoinAddress.h
@@ -50,6 +50,8 @@ public:
 
 	bool setNodePublic(const std::string& strPublic);
 	void setNodePublic(const std::vector<unsigned char>& vPublic);
+	bool verifyNodePublic(const uint256& hash, const std::vector<unsigned char>& vchSig) const;
+	bool verifyNodePublic(const uint256& hash, const std::string& strSig) const;
 
 	//
 	// Node Private
@@ -62,6 +64,7 @@ public:
 	bool setNodePrivate(const std::string& strPrivate);
 	void setNodePrivate(const std::vector<unsigned char>& vPrivate);
 	void setNodePrivate(uint256 hash256);
+	void signNodePrivate(const uint256& hash, std::vector<unsigned char>& vchSig) const;
 
 	//
 	// Accounts IDs