diff --git a/tools/ndnsec/list.hpp b/tools/ndnsec/list.hpp
new file mode 100644
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--- /dev/null
+++ b/tools/ndnsec/list.hpp
@@ -0,0 +1,174 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2014 Regents of the University of California.
+ *
+ * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
+ *
+ * ndn-cxx library is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License and GNU Lesser
+ * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
+ *
+ * @author Yingdi Yu <http://irl.cs.ucla.edu/~yingdi/>
+ */
+
+#ifndef NDN_TOOLS_NDNSEC_LIST_HPP
+#define NDN_TOOLS_NDNSEC_LIST_HPP
+
+#include "util.hpp"
+
+void
+printCertificate(ndn::KeyChain& keyChain,
+                 const ndn::Name& certName,
+                 bool isDefault,
+                 int verboseLevel)
+{
+  if (isDefault)
+    std::cout << "       +->* ";
+  else
+    std::cout << "       +->  ";
+
+  std::cout << certName << std::endl;
+
+  if (verboseLevel >= 3) {
+    ndn::shared_ptr<ndn::IdentityCertificate> certificate = keyChain.getCertificate(certName);
+    if (static_cast<bool>(certificate))
+      certificate->printCertificate(std::cout, "            ");
+  }
+}
+
+void
+printKey(ndn::KeyChain& keyChain,
+         const ndn::Name& keyName,
+         bool isDefault,
+         int verboseLevel)
+{
+  if (isDefault)
+    std::cout << "  +->* ";
+  else
+    std::cout << "  +->  ";
+
+  std::cout << keyName << std::endl;
+
+  if (verboseLevel >= 2) {
+    std::vector<ndn::Name> defaultCertificates;
+    keyChain.getAllCertificateNamesOfKey(keyName, defaultCertificates, true);
+
+    for (const auto& certName : defaultCertificates)
+      printCertificate(keyChain, certName, true, verboseLevel);
+
+    std::vector<ndn::Name> otherCertificates;
+    keyChain.getAllCertificateNamesOfKey(keyName, otherCertificates, false);
+    for (const auto& certName : otherCertificates)
+      printCertificate(keyChain, certName, false, verboseLevel);
+  }
+}
+
+void
+printIdentity(ndn::KeyChain& keyChain,
+              const ndn::Name& identity,
+              bool isDefault,
+              int verboseLevel)
+{
+  if (isDefault)
+    std::cout << "* ";
+  else
+    std::cout << "  ";
+
+  std::cout << identity << std::endl;
+
+  if (verboseLevel >= 1) {
+    std::vector<ndn::Name> defaultKeys;
+    keyChain.getAllKeyNamesOfIdentity(identity, defaultKeys, true);
+    for (const auto& keyName : defaultKeys)
+      printKey(keyChain, keyName, true, verboseLevel);
+
+    std::vector<ndn::Name> otherKeys;
+    keyChain.getAllKeyNamesOfIdentity(identity, otherKeys, false);
+    for (const auto& keyName : otherKeys) {
+      printKey(keyChain, keyName, false, verboseLevel);
+    }
+
+    std::cout << std::endl;
+  }
+}
+
+int
+ndnsec_list(int argc, char** argv)
+{
+  using namespace ndn;
+  namespace po = boost::program_options;
+
+  int verboseLevel = 0; // 0 print identity only
+                        // 1 print key name
+                        // 2 print cert name
+                        // 3 print cert content
+
+  po::options_description options("General Usage\n  ndnsec list [-h] [-k|c]\nGeneral options");
+  options.add_options()
+    ("help,h",    "produce help message")
+    ("key,k",     "granularity: key")
+    ("cert,c",    "granularity: certificate")
+    ("verbose,v", accumulator<int>(&verboseLevel),
+                  "verbose mode: -v is equivalent to -k, -vv is equivalent to -c")
+    ;
+
+  po::options_description oldOptions;
+  oldOptions.add_options()
+    ("key2,K",         "granularity: key")
+    ("cert2,C",        "granularity: certificate");
+
+  po::options_description allOptions;
+  allOptions.add(options).add(oldOptions);
+
+  po::variables_map vm;
+  try {
+    po::store(po::parse_command_line(argc, argv, allOptions), vm);
+    po::notify(vm);
+  }
+  catch (const std::exception& e) {
+    std::cerr << "ERROR: " << e.what() << std::endl;
+    std::cerr << options << std::endl;
+    return 1;
+  }
+
+  if (vm.count("help") != 0) {
+    std::cerr << options << std::endl;;
+    return 0;
+  }
+
+  int tmpVerboseLevel = 0;
+  if (vm.count("cert") != 0 || vm.count("cert2") != 0)
+    tmpVerboseLevel = 2;
+  else if(vm.count("key") != 0 || vm.count("key2") != 0)
+    tmpVerboseLevel = 1;
+
+  verboseLevel = std::max(verboseLevel, tmpVerboseLevel);
+
+  KeyChain keyChain;
+
+  std::vector<Name> defaultIdentities;
+  keyChain.getAllIdentities(defaultIdentities, true);
+  for (const auto& identity : defaultIdentities) {
+    printIdentity(keyChain, identity, true, verboseLevel);
+  }
+
+  std::vector<Name> otherIdentities;
+  keyChain.getAllIdentities(otherIdentities, false);
+  for (const auto& identity : otherIdentities) {
+    printIdentity(keyChain, identity, false, verboseLevel);
+  }
+
+  return 0;
+}
+
+#endif // NDN_TOOLS_NDNSEC_LIST_HPP