diff --git a/core/src/main/java/com/usthe/sureness/processor/support/DigestProcessor.java b/core/src/main/java/com/usthe/sureness/processor/support/DigestProcessor.java
index 5455a27940507581c36b62bad24cf705a6a31993..4d413c43ff6f27aca6a69f02168f7cab8b9b7108 100644
--- a/core/src/main/java/com/usthe/sureness/processor/support/DigestProcessor.java
+++ b/core/src/main/java/com/usthe/sureness/processor/support/DigestProcessor.java
@@ -53,7 +53,7 @@ public class DigestProcessor extends BaseProcessor {
 
     @Override
     public Subject authenticated(Subject var) throws SurenessAuthenticationException {
-        if (var.getPrincipal() == null || var.getCredentials() == null) {
+        if (var.getPrincipal() == null || var.getCredential() == null) {
             String authenticate = getAuthenticate();
             throw new NeedDigestInfoException("you should try once with digest auth information", authenticate);
         }
@@ -74,7 +74,7 @@ public class DigestProcessor extends BaseProcessor {
         //response = MD5("A1:nonce:nc:cNonce:qop:A2");
         String oriResponse = calcDigest(a1, digestSubject.getNonce(), digestSubject.getNc(), digestSubject.getCnonce(),
                 digestSubject.getQop(), a2);
-        if (!oriResponse.equals(digestSubject.getCredentials())) {
+        if (!oriResponse.equals(digestSubject.getCredential())) {
             throw new IncorrectCredentialsException("incorrect password");
         }
         if (account.isDisabledAccount()) {
diff --git a/core/src/main/java/com/usthe/sureness/processor/support/JwtProcessor.java b/core/src/main/java/com/usthe/sureness/processor/support/JwtProcessor.java
index b2831edb6bbefb95beb229f05bd193e40d76522a..82f07cc5e16dc4b935985d8eab9429dad24c8a0f 100644
--- a/core/src/main/java/com/usthe/sureness/processor/support/JwtProcessor.java
+++ b/core/src/main/java/com/usthe/sureness/processor/support/JwtProcessor.java
@@ -41,7 +41,7 @@ public class JwtProcessor extends BaseProcessor {
     @Override
     @SuppressWarnings("unchecked")
     public Subject authenticated(Subject var) throws SurenessAuthenticationException {
-        String jwt = (String) var.getCredentials();
+        String jwt = (String) var.getCredential();
         if (JsonWebTokenUtil.isNotJsonWebToken(jwt)) {
             throw new  IncorrectCredentialsException("this jwt credential is illegal");
         }
diff --git a/core/src/main/java/com/usthe/sureness/processor/support/PasswordProcessor.java b/core/src/main/java/com/usthe/sureness/processor/support/PasswordProcessor.java
index 41ba97dfe35ddc85e00c5117ff3aa7b6eec4e80e..ca5c759b371732370eda399c9e991b001c43fa29 100644
--- a/core/src/main/java/com/usthe/sureness/processor/support/PasswordProcessor.java
+++ b/core/src/main/java/com/usthe/sureness/processor/support/PasswordProcessor.java
@@ -51,8 +51,8 @@ public class PasswordProcessor extends BaseProcessor {
             }
             throw new  UnknownAccountException("do not exist the account: " + appId);
         }
-        if (var.getCredentials() != null && account.getPassword() != null) {
-            String password = String.valueOf(var.getCredentials());
+        if (var.getCredential() != null && account.getPassword() != null) {
+            String password = String.valueOf(var.getCredential());
             if (account.getSalt() != null && !"".equals(account.getSalt())) {
                 password = Md5Util.md5( password + account.getSalt());
             }
diff --git a/core/src/main/java/com/usthe/sureness/subject/Subject.java b/core/src/main/java/com/usthe/sureness/subject/Subject.java
index 824499429a7c96aa11cddff8b4691f1a0469b915..139a312e8f905328787f4303b84c807fd78c8c60 100644
--- a/core/src/main/java/com/usthe/sureness/subject/Subject.java
+++ b/core/src/main/java/com/usthe/sureness/subject/Subject.java
@@ -25,7 +25,7 @@ public interface Subject extends Serializable {
      *
      * @return credential
      */
-    Object getCredentials();
+    Object getCredential();
 
     /**
      * get the roles owned by this account
diff --git a/core/src/main/java/com/usthe/sureness/subject/support/DigestSubject.java b/core/src/main/java/com/usthe/sureness/subject/support/DigestSubject.java
index 5d004e7201b039d8ded54463ab3560ae54669dc1..d6c5cfc50865daabd27090515b162170459ea33a 100644
--- a/core/src/main/java/com/usthe/sureness/subject/support/DigestSubject.java
+++ b/core/src/main/java/com/usthe/sureness/subject/support/DigestSubject.java
@@ -76,7 +76,7 @@ public class DigestSubject implements Subject {
     }
 
     @Override
-    public Object getCredentials() {
+    public Object getCredential() {
         return response;
     }
 
@@ -165,7 +165,7 @@ public class DigestSubject implements Subject {
         @SuppressWarnings("unchecked")
         public Builder(Subject subject) {
             this.appId = String.valueOf(subject.getPrincipal());
-            this.response = String.valueOf(subject.getCredentials());
+            this.response = String.valueOf(subject.getCredential());
             this.ownRoles = (List<String>) subject.getOwnRoles();
             this.targetUri = String.valueOf(subject.getTargetResource());
             this.supportRoles = (List<String>) subject.getSupportRoles();
diff --git a/core/src/main/java/com/usthe/sureness/subject/support/JwtSubject.java b/core/src/main/java/com/usthe/sureness/subject/support/JwtSubject.java
index f6c8380abc13948ebe59146bae56ecae0a3c27f1..1c69f457c3775550f5d92f2045818b0bf1600fe7 100644
--- a/core/src/main/java/com/usthe/sureness/subject/support/JwtSubject.java
+++ b/core/src/main/java/com/usthe/sureness/subject/support/JwtSubject.java
@@ -50,7 +50,7 @@ public class JwtSubject implements Subject {
     }
 
     @Override
-    public Object getCredentials() {
+    public Object getCredential() {
         return this.jwt;
     }
 
@@ -108,7 +108,7 @@ public class JwtSubject implements Subject {
         @SuppressWarnings("unchecked")
         public Builder(Subject subject) {
             this.appId = String.valueOf(subject.getPrincipal());
-            this.jwt = String.valueOf(subject.getCredentials());
+            this.jwt = String.valueOf(subject.getCredential());
             this.ownRoles = (List<String>) subject.getOwnRoles();
             this.targetUri = String.valueOf(subject.getTargetResource());
             this.supportRoles = (List<String>) subject.getSupportRoles();
diff --git a/core/src/main/java/com/usthe/sureness/subject/support/NoneSubject.java b/core/src/main/java/com/usthe/sureness/subject/support/NoneSubject.java
index 96aae5445cc88d3e78bfbfdc1b16d5886fa966fa..560a6cc07d6a2dadcb26456b4af79fcbebb3ee3f 100644
--- a/core/src/main/java/com/usthe/sureness/subject/support/NoneSubject.java
+++ b/core/src/main/java/com/usthe/sureness/subject/support/NoneSubject.java
@@ -38,7 +38,7 @@ public class NoneSubject implements Subject {
     }
 
     @Override
-    public Object getCredentials() {
+    public Object getCredential() {
         return null;
     }
 
diff --git a/core/src/main/java/com/usthe/sureness/subject/support/PasswordSubject.java b/core/src/main/java/com/usthe/sureness/subject/support/PasswordSubject.java
index 6fe8be19c3b7fc8bab04891310c07411a1616243..cb38bc5173f9bf14e64181f62a8bd960c4b3c928 100644
--- a/core/src/main/java/com/usthe/sureness/subject/support/PasswordSubject.java
+++ b/core/src/main/java/com/usthe/sureness/subject/support/PasswordSubject.java
@@ -47,7 +47,7 @@ public class PasswordSubject implements Subject {
     }
 
     @Override
-    public Object getCredentials() {
+    public Object getCredential() {
         return this.password;
     }
 
@@ -97,7 +97,7 @@ public class PasswordSubject implements Subject {
         @SuppressWarnings("unchecked")
         public Builder(Subject subject) {
             this.appId = String.valueOf(subject.getPrincipal());
-            this.password = String.valueOf(subject.getCredentials());
+            this.password = String.valueOf(subject.getCredential());
             this.ownRoles = (List<String>) subject.getOwnRoles();
             this.targetUri = String.valueOf(subject.getTargetResource());
             this.supportRoles = (List<String>) subject.getSupportRoles();
diff --git a/sample-tom/src/main/java/com/usthe/sureness/sample/tom/sureness/processor/CustomTokenProcessor.java b/sample-tom/src/main/java/com/usthe/sureness/sample/tom/sureness/processor/CustomTokenProcessor.java
index 38fc02e2511b45e8fe88b59aef82ecc005442845..bad529e090434ae57585e6f55d1940ac196d45cf 100644
--- a/sample-tom/src/main/java/com/usthe/sureness/sample/tom/sureness/processor/CustomTokenProcessor.java
+++ b/sample-tom/src/main/java/com/usthe/sureness/sample/tom/sureness/processor/CustomTokenProcessor.java
@@ -42,7 +42,7 @@ public class CustomTokenProcessor extends BaseProcessor {
     @Override
     @SuppressWarnings("unchecked")
     public Subject authenticated(Subject var) throws SurenessAuthenticationException {
-        String token = (String) var.getCredentials();
+        String token = (String) var.getCredential();
         String[] tokenArr = token.split(TOKEN_SPLIT);
         if (TokenStorage.matchToken(tokenArr[0], token)) {
             // auth passed
diff --git a/sample-tom/src/main/java/com/usthe/sureness/sample/tom/sureness/subject/CustomTokenSubject.java b/sample-tom/src/main/java/com/usthe/sureness/sample/tom/sureness/subject/CustomTokenSubject.java
index be231d8f0a9c38a8693f9387ed3f9370782ee267..65a800ae8f282de7e486749be74639064971ca3f 100644
--- a/sample-tom/src/main/java/com/usthe/sureness/sample/tom/sureness/subject/CustomTokenSubject.java
+++ b/sample-tom/src/main/java/com/usthe/sureness/sample/tom/sureness/subject/CustomTokenSubject.java
@@ -50,7 +50,7 @@ public class CustomTokenSubject implements Subject {
     }
 
     @Override
-    public Object getCredentials() {
+    public Object getCredential() {
         return this.token;
     }
 
@@ -108,7 +108,7 @@ public class CustomTokenSubject implements Subject {
         @SuppressWarnings("unchecked")
         public Builder(Subject subject) {
             this.appId = String.valueOf(subject.getPrincipal());
-            this.token = String.valueOf(subject.getCredentials());
+            this.token = String.valueOf(subject.getCredential());
             this.ownRoles = (List<String>) subject.getOwnRoles();
             this.targetUri = String.valueOf(subject.getTargetResource());
             this.supportRoles = (List<String>) subject.getSupportRoles();