diff --git a/src/main/java/com/cisd/tms/modules/mk/dto/UKeySignDTO.java b/src/main/java/com/cisd/tms/modules/mk/dto/UKeySignDTO.java
index 760accb..ce8d1b9 100644
--- a/src/main/java/com/cisd/tms/modules/mk/dto/UKeySignDTO.java
+++ b/src/main/java/com/cisd/tms/modules/mk/dto/UKeySignDTO.java
@@ -26,9 +26,5 @@ public class UKeySignDTO {
      * UKey 中的认证信息
      */
     private String rid;
-    
-    /**
-     * 需要处理的其他信息，不参与签名，这里是主密钥复制是暂时存储的分量
-     */
-    private String extra;
+
 }