diff --git a/crypto/crypto.go b/crypto/crypto.go
index d1186e7..a4763c2 100644
--- a/crypto/crypto.go
+++ b/crypto/crypto.go
@@ -47,7 +47,23 @@ func ToPubKey(pubKey string) (ic.PubKey, error) {
 	if err != nil {
 		return nil, err
 	}
-	return ic.UnmarshalSecp256k1PublicKey(raw)
+	return ic.UnmarshalPublicKey(raw)
+}
+
+func FromPubKey(pubKey ic.PubKey) (string, error) {
+	pkb, err := ic.MarshalPublicKey(pubKey)
+	if err != nil {
+		return "", err
+	}
+	return base64.StdEncoding.EncodeToString(pkb), nil
+}
+
+func FromPrivKey(privKey ic.PrivKey) (string, error) {
+	prkb, err := ic.MarshalPrivateKey(privKey)
+	if err != nil {
+		return "", err
+	}
+	return base64.StdEncoding.EncodeToString(prkb), nil
 }
 
 // Secp256k1 private key string to ic.PrivKey interface
diff --git a/crypto/crypto_test.go b/crypto/crypto_test.go
index e34fbac..a02da94 100644
--- a/crypto/crypto_test.go
+++ b/crypto/crypto_test.go
@@ -1,6 +1,7 @@
 package crypto
 
 import (
+	"bytes"
 	"testing"
 
 	ledgerPb "github.com/tron-us/go-btfs-common/protos/ledger"
@@ -55,3 +56,50 @@ func TestEncryptDecrypt(t *testing.T) {
 		t.Errorf("Decrypt failed")
 	}
 }
+
+func TestSerializeDeserializeKey(t *testing.T) {
+	privKey, err := ToPrivKey(KeyString)
+	if err != nil {
+		t.Error("ToPrivKey failed", err)
+		return
+	}
+	privKeyString, err := FromPrivKey(privKey)
+	if err != nil {
+		t.Error("FromPrivKey failed", err)
+		return
+	}
+	if privKeyString != KeyString {
+		t.Error("serialize and deserialize private key fail", err)
+		return
+	}
+
+	pubKey := privKey.GetPublic()
+	pubKeyString, err := FromPubKey(pubKey)
+	if err != nil {
+		t.Error("FromPubKey failed", err)
+		return
+	}
+
+	nPubKey, err := ToPubKey(pubKeyString)
+	if err != nil {
+		t.Error("ToPubKey failed", err)
+		return
+	}
+
+	pubkeyRaw, err := pubKey.Raw()
+	if err != nil {
+		t.Error("get pubkey raw failed", err)
+		return
+	}
+	nPubkeyRaw, err := nPubKey.Raw()
+	if err != nil {
+		t.Error("get PubKey raw failed", err)
+		return
+	}
+
+	if bytes.Compare(pubkeyRaw, nPubkeyRaw) != 0 {
+		t.Error("serialize and deserialize pub key fail", err)
+		return
+	}
+
+}