diff --git a/core/blockchain.go b/core/blockchain.go
index d917dcc0c..a47d7b749 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -72,7 +72,7 @@ type BlockChain struct {
 
 	superNode bool
 
-	shieldKeyword string
+	unsupportedKeyword string
 }
 
 const (
@@ -135,16 +135,16 @@ func NewBlockChain(neb Neblet) (*BlockChain, error) {
 	txPool.RegisterInNetwork(neb.NetService())
 
 	var bc = &BlockChain{
-		chainID:       neb.Config().Chain.ChainId,
-		genesis:       neb.Genesis(),
-		bkPool:        blockPool,
-		txPool:        txPool,
-		storage:       neb.Storage(),
-		eventEmitter:  neb.EventEmitter(),
-		nvm:           neb.Nvm(),
-		quitCh:        make(chan int, 1),
-		superNode:     neb.Config().Chain.SuperNode,
-		shieldKeyword: neb.Config().Chain.ShieldKeyword,
+		chainID:            neb.Config().Chain.ChainId,
+		genesis:            neb.Genesis(),
+		bkPool:             blockPool,
+		txPool:             txPool,
+		storage:            neb.Storage(),
+		eventEmitter:       neb.EventEmitter(),
+		nvm:                neb.Nvm(),
+		quitCh:             make(chan int, 1),
+		superNode:          neb.Config().Chain.SuperNode,
+		unsupportedKeyword: neb.Config().Chain.UnsupportedKeyword,
 	}
 
 	bc.cachedBlocks, err = lru.New(128)
diff --git a/core/transaction_pool.go b/core/transaction_pool.go
index c3fe1ddd4..a262ed8ce 100644
--- a/core/transaction_pool.go
+++ b/core/transaction_pool.go
@@ -254,19 +254,19 @@ func (pool *TransactionPool) Push(tx *Transaction) error {
 	pool.mu.Lock()
 	defer pool.mu.Unlock()
 
-	//if super node and tx type is deploy, add keyword shielding.
-	if pool.bc.superNode == true && len(pool.bc.shieldKeyword) > 0 && len(tx.Data()) > 0 {
+	//if is super node and tx type is deploy, do unsupported keyword checking.
+	if pool.bc.superNode == true && len(pool.bc.unsupportedKeyword) > 0 && len(tx.Data()) > 0 {
 		if tx.Type() == TxPayloadDeployType {
 			data := string(tx.Data())
-			keywords := strings.Split(pool.bc.shieldKeyword, ",")
+			keywords := strings.Split(pool.bc.unsupportedKeyword, ",")
 			for _, keyword := range keywords {
 				keyword = strings.ToLower(keyword)
 				if strings.Contains(data, keyword) {
 					logging.VLog().WithFields(logrus.Fields{
-						"tx":              tx,
-						"shieldedKeyword": keyword,
-					}).Debug("transaction data has shielded keyword")
-					return ErrShieldedKeyword
+						"tx":                 tx,
+						"unsupportedKeyword": keyword,
+					}).Debug("transaction data has unsupported keyword")
+					return ErrUnsupportedKeyword
 				}
 			}
 		}
diff --git a/core/types.go b/core/types.go
index 4e0931b2b..1613160b3 100644
--- a/core/types.go
+++ b/core/types.go
@@ -163,8 +163,8 @@ var (
 	// nvm error
 	ErrExecutionFailed = errors.New("execution failed")
 
-	// shielded keywork error
-	ErrShieldedKeyword = errors.New("transaction data has unsupported keywords")
+	// unsupported keyword error in smart contract
+	ErrUnsupportedKeyword = errors.New("transaction data has unsupported keyword")
 )
 
 // Default gas count
diff --git a/neblet/pb/config.pb.go b/neblet/pb/config.pb.go
index abf91cee8..29fd90984 100644
--- a/neblet/pb/config.pb.go
+++ b/neblet/pb/config.pb.go
@@ -205,9 +205,9 @@ type ChainConfig struct {
 	// Max GasLimit.
 	GasLimit string `protobuf:"bytes,27,opt,name=gas_limit,json=gasLimit,proto3" json:"gas_limit"`
 	// Supported signature cipher list. ["ECC_SECP256K1"]
-	SignatureCiphers []string `protobuf:"bytes,28,rep,name=signature_ciphers,json=signatureCiphers" json:"signature_ciphers"`
-	SuperNode        bool     `protobuf:"varint,30,opt,name=super_node,json=superNode,proto3" json:"super_node"`
-	ShieldKeyword    string   `protobuf:"bytes,31,opt,name=shield_keyword,json=shieldKeyword,proto3" json:"shield_keyword"`
+	SignatureCiphers   []string `protobuf:"bytes,28,rep,name=signature_ciphers,json=signatureCiphers" json:"signature_ciphers"`
+	SuperNode          bool     `protobuf:"varint,30,opt,name=super_node,json=superNode,proto3" json:"super_node"`
+	UnsupportedKeyword string   `protobuf:"bytes,31,opt,name=unsupported_keyword,json=unsupportedKeyword,proto3" json:"unsupported_keyword"`
 }
 
 func (m *ChainConfig) Reset()                    { *m = ChainConfig{} }
@@ -313,9 +313,9 @@ func (m *ChainConfig) GetSuperNode() bool {
 	return false
 }
 
-func (m *ChainConfig) GetShieldKeyword() string {
+func (m *ChainConfig) GetUnsupportedKeyword() string {
 	if m != nil {
-		return m.ShieldKeyword
+		return m.UnsupportedKeyword
 	}
 	return ""
 }
@@ -609,68 +609,68 @@ func init() {
 func init() { proto.RegisterFile("config.proto", fileDescriptorConfig) }
 
 var fileDescriptorConfig = []byte{
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+	0x67, 0x38, 0xc1, 0x2a, 0x1d, 0x97, 0x98, 0x58, 0x9c, 0x69, 0x8f, 0x89, 0x53, 0x45, 0x95, 0x70,
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+	0xab, 0x32, 0x94, 0xef, 0xea, 0x6f, 0x2f, 0x52, 0xf7, 0x40, 0x71, 0x43, 0x72, 0x5f, 0xe4, 0xe9,
+	0x82, 0xe4, 0x5e, 0x88, 0xf7, 0xf0, 0x86, 0x12, 0xa4, 0x7e, 0x6e, 0x31, 0xc9, 0x94, 0x99, 0xa2,
+	0x75, 0xf2, 0xff, 0x6c, 0xa4, 0xfe, 0x82, 0x18, 0xd5, 0x38, 0x17, 0x70, 0x6e, 0xd0, 0x26, 0x95,
+	0xce, 0x51, 0x9e, 0x85, 0x02, 0x12, 0xf2, 0x49, 0xe7, 0x28, 0x7e, 0x80, 0x83, 0x79, 0xe5, 0xe6,
+	0xc6, 0x68, 0xeb, 0x31, 0x27, 0xd7, 0x7d, 0xd6, 0x36, 0x97, 0xe7, 0x9c, 0x52, 0xac, 0x50, 0xb7,
+	0x35, 0x33, 0xf8, 0xa7, 0x05, 0xd1, 0xe2, 0xc5, 0xd1, 0xe9, 0xd6, 0x64, 0x49, 0x30, 0x73, 0x6d,
+	0xf1, 0xc8, 0x9a, 0xec, 0x6e, 0xe1, 0xe7, 0xa9, 0xf7, 0x26, 0x59, 0x33, 0x3b, 0x10, 0xb4, 0x21,
+	0x98, 0xe9, 0x7c, 0x5e, 0xa2, 0xdc, 0x5a, 0x0a, 0xee, 0x19, 0xa1, 0xbb, 0x66, 0xba, 0xaa, 0x30,
+	0xf3, 0x4a, 0x57, 0x8d, 0x4f, 0xb7, 0xd9, 0xa7, 0xfd, 0x25, 0x11, 0x9c, 0xbd, 0x4c, 0xb7, 0x62,
+	0xfe, 0x90, 0x8e, 0x05, 0xa7, 0x10, 0xb1, 0x20, 0xd3, 0x96, 0xdc, 0x4e, 0xc9, 0x3a, 0x04, 0x8c,
+	0xb4, 0x75, 0x83, 0x7f, 0x5b, 0x10, 0x2d, 0x5e, 0x33, 0x49, 0x4b, 0x5d, 0x24, 0x25, 0x3e, 0x63,
+	0xc9, 0x06, 0x8f, 0xe2, 0x4e, 0xa9, 0x8b, 0x3b, 0x8a, 0xc9, 0xfc, 0x44, 0x4e, 0x54, 0x89, 0x8d,
+	0xc5, 0x4b, 0x5d, 0xfc, 0xaa, 0x4a, 0x14, 0xc7, 0x40, 0xcb, 0x24, 0x2d, 0x90, 0x9f, 0xef, 0x5e,
+	0xbc, 0x5b, 0xea, 0xe2, 0x63, 0x81, 0xe2, 0x0a, 0x0e, 0x82, 0xb1, 0x32, 0x9b, 0xba, 0x69, 0x62,
+	0x91, 0x0a, 0xcb, 0x77, 0xe9, 0xc4, 0x6f, 0x6a, 0x6a, 0x44, 0x4c, 0xcc, 0x84, 0x18, 0x42, 0x7f,
+	0x55, 0x98, 0xcc, 0x6d, 0xc9, 0x37, 0x8a, 0xe2, 0xfd, 0x6c, 0x29, 0xfb, 0xdd, 0x96, 0x34, 0xf1,
+	0x8c, 0xb1, 0x7a, 0xc2, 0xef, 0x77, 0x6d, 0xe2, 0x3d, 0x10, 0xdc, 0x4c, 0x3c, 0xd6, 0xd0, 0x13,
+	0x7c, 0x46, 0xeb, 0x94, 0xae, 0x78, 0x40, 0x46, 0x71, 0x13, 0x0e, 0x2a, 0xe8, 0xae, 0xe8, 0x37,
+	0x7b, 0x57, 0x97, 0x60, 0xb5, 0x77, 0x67, 0x00, 0x99, 0x99, 0xd3, 0x8e, 0x65, 0x19, 0x56, 0x10,
+	0xe2, 0x67, 0x38, 0x6b, 0xf8, 0x30, 0xcb, 0x96, 0xc8, 0xe0, 0x16, 0x60, 0x39, 0x65, 0xc5, 0x2f,
+	0x70, 0x9a, 0xe3, 0x24, 0x9d, 0x97, 0x9e, 0x4c, 0xe8, 0xbc, 0xb6, 0xc8, 0xf5, 0x25, 0x83, 0xa3,
+	0x0d, 0xe9, 0x65, 0x90, 0xdc, 0x06, 0x05, 0x55, 0x7c, 0x44, 0xfc, 0xe0, 0x8f, 0x36, 0x74, 0x57,
+	0xe6, 0xbb, 0xb8, 0x84, 0xfd, 0x50, 0xed, 0x19, 0x7a, 0xab, 0x32, 0xc7, 0x27, 0x74, 0xe2, 0xbd,
+	0x1a, 0xbd, 0xaf, 0x41, 0xf1, 0x00, 0xfd, 0xba, 0xbc, 0xaa, 0x2a, 0x1a, 0x13, 0x92, 0x4b, 0xf7,
+	0xaf, 0x2f, 0xbf, 0xfa, 0xbb, 0x71, 0x15, 0x37, 0xea, 0xda, 0x9f, 0xf1, 0x6b, 0xbb, 0x0e, 0x88,
+	0x0f, 0xd0, 0x51, 0xd5, 0xa4, 0x9c, 0x7f, 0xc9, 0xc7, 0x3c, 0xe3, 0xba, 0xd7, 0x72, 0x79, 0xd2,
+	0x4d, 0x60, 0x42, 0x4b, 0x16, 0x4a, 0xf1, 0x2d, 0xf4, 0xc2, 0x77, 0x26, 0x3e, 0x2d, 0x9c, 0xec,
+	0xb1, 0x37, 0xbb, 0x01, 0xfb, 0x2d, 0x2d, 0xdc, 0xe0, 0x1c, 0x5e, 0x6f, 0x24, 0x17, 0x3d, 0xe8,
+	0x34, 0x27, 0xf6, 0xff, 0x37, 0xf8, 0x02, 0xfb, 0xeb, 0xe7, 0xd3, 0x4f, 0xcf, 0x54, 0x3b, 0x1f,
+	0x8a, 0xc7, 0x6b, 0xc2, 0xd8, 0x77, 0x6d, 0x36, 0x27, 0xaf, 0xc5, 0x3e, 0xb4, 0xf3, 0x71, 0xe8,
+	0x50, 0x3b, 0x1f, 0x93, 0x66, 0xee, 0xd0, 0xb2, 0x37, 0xa3, 0x98, 0xd7, 0x34, 0x69, 0x69, 0x4a,
+	0xf2, 0x74, 0xa8, 0x6d, 0xb8, 0x88, 0xc7, 0xbb, 0xfc, 0xaf, 0xe0, 0xa7, 0xff, 0x02, 0x00, 0x00,
+	0xff, 0xff, 0xb9, 0xef, 0xf9, 0x0f, 0x25, 0x08, 0x00, 0x00,
 }
diff --git a/neblet/pb/config.proto b/neblet/pb/config.proto
index 34000dd3e..a96edf95f 100644
--- a/neblet/pb/config.proto
+++ b/neblet/pb/config.proto
@@ -86,7 +86,7 @@ message ChainConfig {
 
     bool super_node = 30;
 
-    string shield_keyword = 31;
+    string unsupported_keyword = 31;
 }
 
 message RPCConfig {