diff --git a/src/chat-policy-rule.cpp b/src/chat-policy-rule.cpp
new file mode 100644
index 0000000..1aa8b24
--- /dev/null
+++ b/src/chat-policy-rule.cpp
@@ -0,0 +1,62 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2013, Regents of the University of California
+ *                     Yingdi Yu
+ *
+ * BSD license, See the LICENSE file for more information
+ *
+ * Author: Yingdi Yu <yingdi@cs.ucla.edu>
+ */
+
+#include "chat-policy-rule.cpp"
+
+using namespace ndn;
+using namespace std;
+using namespace ndn::security;
+
+
+ChatPolicyRule::ChatPolicyRule(Ptr<Regex> dataRegex, const Name& dataRef,
+			       Ptr<Regex> signerRegex, const Name& signerRef,
+			       bool isPositive)
+  : PolicyRule(PolicyRule::IDENTITY_POLICY, isPositive)
+  , m_dataRegex(dataRegex)
+  , m_signerRegex(signerRegex)
+  , m_dataRef(dataRef)
+  , m_signerRef(signerRef)
+{}
+
+bool 
+ChatPolicyRule::matchDataName(const Data & data)
+{ return (m_dataRegex.match(data.getName()) && m_dataRegex.expand() == m_dataRef) ? true : false; }
+
+bool 
+ChatPolicyRule::matchSignerName(const Data & data)
+{ 
+  Ptr<const signature::Sha256WithRsa> sigPtr = DynamicCast<const signature::Sha256WithRsa> (data.getSignature());
+  Name signerName = sigPtr->getKeyLocator ().getKeyName ();
+  return (m_signerRegex.match(signerName) && m_signerRegex.expand() == m_signerRef) ? true : false; 
+}
+
+bool
+ChatPolicyRule::satisfy(const Data & data)
+{ return (matchDataName(data) && matchSignerName(data)) ? true : false ; }
+
+bool
+ChatPolicyRule::satisfy(const Name & dataName, const Name & signerName)
+{
+  if (m_dataRegex.match(data.getName()) 
+      && m_dataRegex.expand() == m_dataRef
+      && m_signerRegex.match(signerName) 
+      && m_signerRegex.expand() == m_signerRef)
+    return true;
+  else
+    return false;
+}
+  
+TiXmlElement *
+ChatPolicyRule::toXmlElement()
+{
+  //TODO:
+  return NULL;
+}
+};
diff --git a/src/chat-policy-rule.h b/src/chat-policy-rule.h
new file mode 100644
index 0000000..dfb434d
--- /dev/null
+++ b/src/chat-policy-rule.h
@@ -0,0 +1,47 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2013, Regents of the University of California
+ *                     Yingdi Yu
+ *
+ * BSD license, See the LICENSE file for more information
+ *
+ * Author: Yingdi Yu <yingdi@cs.ucla.edu>
+ */
+
+#ifndef CHAT_POLICY_RULE_H
+#define CHAT_POLICY_RULE_H
+
+#include <ndn.cxx/security/policy/policy-rule.h>
+
+class ChatPolicyRule : public ndn::security::PolicyRule
+{
+  
+public:
+  ChatPolicyRule();
+
+  virtual
+  ~ChatPolicyRyle() {};
+
+  bool 
+  matchDataName(const Data & data);
+
+  bool 
+  matchSignerName(const Data & data);
+
+  bool
+  satisfy(const Data & data);
+
+  bool
+  satisfy(const Name & dataName, const Name & signerName);
+  
+  TiXmlElement *
+  toXmlElement();
+
+private:
+  ndn::Ptr<ndn::Regex> m_dataRegex;
+  ndn::Ptr<ndn::Regex> m_signerRegex;
+  ndn::Name m_dataRef;
+  ndn::Name m_signerRef;
+};
+
+#endif //CHAT_POLICY_RULE_H