diff --git a/src/security/verifier.hpp b/src/security/verifier.hpp
index 07c1494..a9bded4 100644
--- a/src/security/verifier.hpp
+++ b/src/security/verifier.hpp
@@ -83,10 +83,13 @@
   /*****************************************
    *      verifySignature method set       *
    *****************************************/
-    static bool
+  static bool
   verifySignature(const Data &data, const Signature &sig, const PublicKey &publicKey);
 
   static bool
+  verifySignature(const Interest &interest, const PublicKey &publicKey);
+
+  static bool
   verifySignature(const Buffer &data, const Signature &sig, const PublicKey &publicKey);
 
   static bool
@@ -94,6 +97,10 @@
 
   static bool
   verifySignature(const Buffer &data, const SignatureSha256WithRsa &sig, const PublicKey &publicKey);
+  
+  static bool
+  verifySignature(const uint8_t* buf, const size_t size, const SignatureSha256WithRsa &sig, const PublicKey &publicKey);
+
 
 public:
   static const ptr_lib::shared_ptr<SecPolicy>     DefaultPolicy;