diff --git a/core/constants/network-crypto.go b/core/constants/network-crypto.go
index fe54cf2..71485ea 100644
--- a/core/constants/network-crypto.go
+++ b/core/constants/network-crypto.go
@@ -8,15 +8,18 @@ import (
 type CryptoType int
 
 const (
-	CryptoTypeTLS CryptoType = iota
+	CryptoTypeNONE CryptoType = iota
+	CryptoTypeTLS
 )
 
 var (
 	cryptoTypeID = map[CryptoType]string{
-		CryptoTypeTLS: "TLS",
+		CryptoTypeNONE: "",
+		CryptoTypeTLS:  "TLS",
 	}
 
 	cryptoTypeName = map[string]CryptoType{
+		"":    CryptoTypeNONE,
 		"TLS": CryptoTypeTLS,
 	}
 )