diff --git a/tools/ndnsec-cert-install.hpp b/tools/ndnsec-cert-install.hpp
new file mode 100644
index 0000000..1d3347f
--- /dev/null
+++ b/tools/ndnsec-cert-install.hpp
@@ -0,0 +1,244 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2013, Regents of the University of California
+ * BSD license, See the LICENSE file for more information
+ * Author: Yingdi Yu <yingdi@cs.ucla.edu>
+ */
+
+#ifndef NDNSEC_CERT_INSTALL_HPP
+#define NDNSEC_CERT_INSTALL_HPP
+
+#include "ndnsec-util.hpp"
+
+
+struct HttpException : public std::exception
+{
+  HttpException(const std::string &reason)
+    : m_reason(reason)
+  {
+  }
+  ~HttpException() throw()
+  {
+  }
+
+  const char* what() const throw()
+  {
+    return m_reason.c_str();
+  }
+
+private:
+  std::string m_reason;
+};
+
+ndn::shared_ptr<ndn::IdentityCertificate>
+getCertificateHttp(const std::string &host, const std::string &port, const std::string &path)
+{
+  using namespace boost::asio::ip;
+  tcp::iostream request_stream;
+#if (BOOST_VERSION >= 104700)
+  request_stream.expires_from_now(boost::posix_time::milliseconds(3000));
+#endif
+  request_stream.connect(host,port);
+  if(!request_stream)
+    {
+      throw HttpException("HTTP connection error");
+    }
+  request_stream << "GET " << path << " HTTP/1.0\r\n";
+  request_stream << "Host: " << host << "\r\n";
+  request_stream << "Accept: */*\r\n";
+  request_stream << "Cache-Control: no-cache\r\n";
+  request_stream << "Connection: close\r\n\r\n";
+  request_stream.flush();
+
+  std::string line1;
+  std::getline(request_stream,line1);
+  if (!request_stream)
+    {
+      throw HttpException("HTTP communication error");
+    }
+
+  std::stringstream response_stream(line1);
+  std::string http_version;
+  response_stream >> http_version;
+  unsigned int status_code;
+  response_stream >> status_code;
+  std::string status_message;
+
+  std::getline(response_stream,status_message);
+  if (!response_stream || http_version.substr(0,5)!="HTTP/")
+    {
+      throw HttpException("HTTP communication error");
+    }
+  if (status_code!=200)
+    {
+      throw HttpException("HTTP server error");
+    }
+  std::string header;
+  while (std::getline(request_stream, header) && header != "\r") ;
+
+  ndn::OBufferStream os;
+  CryptoPP::FileSource ss2(request_stream, true, new CryptoPP::Base64Decoder(new CryptoPP::FileSink(os)));
+
+  ndn::shared_ptr<ndn::IdentityCertificate> identityCertificate = ndn::make_shared<ndn::IdentityCertificate>();
+  identityCertificate->wireDecode(ndn::Block(os.buf()));
+
+  return identityCertificate;
+}
+
+int 
+ndnsec_cert_install(int argc, char** argv)
+{
+  using namespace ndn;
+  namespace po = boost::program_options;
+
+  std::string certFileName;
+  bool systemDefault = true;
+  bool identityDefault = false;
+  bool keyDefault = false;
+  bool noDefault = false;
+  bool any = false;
+
+  po::options_description desc("General Usage\n  ndnsec cert-install [-h] [-I|K|N] cert-file\nGeneral options");
+  desc.add_options()
+    ("help,h", "produce help message")
+    ("cert-file,f", po::value<std::string>(&certFileName), "file name of the ceritificate, - for stdin. "
+                                                      "If starts with http://, will try to fetch "
+                                                      "the certificate using HTTP GET request")
+    ("identity-default,I", "optional, if specified, the certificate will be set as the default certificate of the identity")
+    ("key-default,K", "optional, if specified, the certificate will be set as the default certificate of the key")
+    ("no-default,N", "optional, if specified, the certificate will be simply installed")
+    ;
+  po::positional_options_description p;
+  p.add("cert-file", 1);
+
+  po::variables_map vm;
+  try
+    {
+      po::store(po::command_line_parser(argc, argv).options(desc).positional(p).run(), vm);
+      po::notify(vm);
+    }
+  catch (std::exception &e)
+    {
+      std::cerr << "ERROR: " << e.what() << std::endl;
+      return 1;
+    }
+
+  if (vm.count("help"))
+    {
+      std::cerr << desc << std::endl;
+      return 0;
+    }
+
+  if (0 == vm.count("cert-file"))
+    {
+      std::cerr << "cert_file must be specified" << std::endl;
+      std::cerr << desc << std::endl;
+      return 1;
+    }
+
+  if (vm.count("identity-default"))
+    {
+      identityDefault = true;
+      systemDefault = false;
+    }
+  else if (vm.count("key-default"))
+    {
+      keyDefault = true;
+      systemDefault = false;
+    }
+  else if (vm.count("no-default"))
+    {
+      noDefault = true;
+      systemDefault = false;
+    }
+
+  try
+    {
+      shared_ptr<IdentityCertificate> cert;
+
+      if(certFileName.find("http://") == 0)
+        {
+          std::string host;
+          std::string port;
+          std::string path;
+
+          size_t pos = 7;
+          size_t posSlash = certFileName.find ("/", pos);
+
+          if (posSlash == std::string::npos)
+            throw HttpException("Request line is not correctly formatted");
+
+          size_t posPort = certFileName.find (":", pos);
+
+          if (posPort != std::string::npos && posPort < posSlash) // port is specified
+            {
+              port = certFileName.substr (posPort + 1, posSlash - posPort - 1);
+              host = certFileName.substr (pos, posPort-pos);
+            }
+          else
+            {
+              port = "80";
+              host = certFileName.substr (pos, posSlash-pos);
+            }
+
+          path = certFileName.substr (posSlash, certFileName.size () - posSlash);
+
+          cert = getCertificateHttp(host, port, path);
+        }
+      else
+        {
+          cert = getIdentityCertificate(certFileName);
+        }
+
+      if(!static_cast<bool>(cert))
+        return 1;
+
+      KeyChain keyChain;
+
+      if(systemDefault)
+        {
+          keyChain.addCertificateAsIdentityDefault(*cert);
+          Name keyName = cert->getPublicKeyName();
+          Name identity = keyName.getSubName(0, keyName.size()-1);
+          keyChain.setDefaultIdentity(identity);
+        }
+      else if(identityDefault)
+        {
+          keyChain.addCertificateAsIdentityDefault(*cert);
+        }
+      else if(keyDefault)
+        {
+          keyChain.addCertificateAsKeyDefault(*cert);
+        }
+      else
+        {
+          keyChain.addCertificate(*cert);
+        }
+
+      std::cerr << "OK: certificate with name [" << cert->getName().toUri() << "] has been successfully installed" << std::endl;
+
+      return 0;
+    }
+  catch(SecPublicInfo::Error& e)
+    {
+      std::cerr << "ERROR: " << e.what() << std::endl;
+      return 1;
+    }
+  catch(SecTpm::Error& e)
+    {
+      std::cerr << "ERROR: " << e.what() << std::endl;
+      return 1;
+    }
+  catch(std::exception &e)
+    {
+      std::cerr << "ERROR: " << e.what() << std::endl;
+      return 1;
+    }
+  catch(...)
+    {
+      std::cerr << "ERROR: unknown error" << std::endl;
+      return 1;
+    }
+}
+
+#endif //NDNSEC_CERT_INSTALL_HPP