diff --git a/include/ndn-cpp/security/validation-request.hpp b/include/ndn-cpp/security/validation-request.hpp
new file mode 100644
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--- /dev/null
+++ b/include/ndn-cpp/security/validation-request.hpp
@@ -0,0 +1,48 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/**
+ * Copyright (C) 2013 Regents of the University of California.
+ * @author: Yingdi Yu <yingdi@cs.ucla.edu>
+ * @author: Jeff Thompson <jefft0@remap.ucla.edu>
+ * See COPYING for copyright and distribution information.
+ */
+
+#ifndef NDN_VALIDATION_REQUEST_HPP
+#define NDN_VALIDATION_REQUEST_HPP
+
+#include "../interest.hpp"
+
+namespace ndn {
+
+/**
+ * An OnVerified function object is used to pass a callback to verifyData to report a successful verification.
+ */
+typedef func_lib::function<void(const ptr_lib::shared_ptr<Data>& data)> OnVerified;
+
+/**
+ * An OnVerifyFailed function object is used to pass a callback to verifyData to report a failed verification.
+ */
+typedef func_lib::function<void(const ptr_lib::shared_ptr<Data>& data)> OnVerifyFailed;
+
+
+class ValidationRequest {
+public:
+  ValidationRequest
+    (const ptr_lib::shared_ptr<Interest> &interest, const OnVerified& onVerified, const OnVerifyFailed& onVerifyFailed,
+     int retry, int stepCount)
+  : interest_(interest), onVerified_(onVerified), onVerifyFailed_(onVerifyFailed), retry_(retry), stepCount_(stepCount)
+  {
+  }
+    
+  virtual
+  ~ValidationRequest() {}
+
+  ptr_lib::shared_ptr<Interest> interest_; // An interest packet to fetch the requested data.
+  OnVerified onVerified_;                  // A callback function if the requested certificate has been validated.
+  OnVerifyFailed onVerifyFailed_;          // A callback function if the requested certificate cannot be validated.
+  int retry_;                              // The number of retrials when there is an interest timeout.
+  int stepCount_;
+};
+
+}
+
+#endif