diff --git a/tools/ndnsec/cert-install.cpp b/tools/ndnsec/cert-install.cpp
new file mode 100644
index 0000000..72a82bd
--- /dev/null
+++ b/tools/ndnsec/cert-install.cpp
@@ -0,0 +1,213 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2017 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.
+ */
+
+#include "ndnsec.hpp"
+#include "util.hpp"
+
+namespace ndn {
+namespace ndnsec {
+
+class HttpException : public std::runtime_error
+{
+public:
+  explicit
+  HttpException(const std::string& what)
+    : std::runtime_error(what)
+  {
+  }
+};
+
+shared_ptr<security::v1::IdentityCertificate>
+getCertificateHttp(const std::string& host, const std::string& port, const std::string& path)
+{
+  using namespace boost::asio::ip;
+  tcp::iostream requestStream;
+
+  requestStream.expires_from_now(boost::posix_time::milliseconds(3000));
+
+  requestStream.connect(host, port);
+  if (!requestStream) {
+    BOOST_THROW_EXCEPTION(HttpException("HTTP connection error"));
+  }
+  requestStream << "GET " << path << " HTTP/1.0\r\n";
+  requestStream << "Host: " << host << "\r\n";
+  requestStream << "Accept: */*\r\n";
+  requestStream << "Cache-Control: no-cache\r\n";
+  requestStream << "Connection: close\r\n\r\n";
+  requestStream.flush();
+
+  std::string statusLine;
+  std::getline(requestStream, statusLine);
+  if (!requestStream) {
+    BOOST_THROW_EXCEPTION(HttpException("HTTP communication error"));
+  }
+
+  std::stringstream responseStream(statusLine);
+  std::string httpVersion;
+  responseStream >> httpVersion;
+  unsigned int statusCode;
+  responseStream >> statusCode;
+  std::string statusMessage;
+
+  std::getline(responseStream, statusMessage);
+  if (!requestStream || httpVersion.substr(0, 5) != "HTTP/") {
+    BOOST_THROW_EXCEPTION(HttpException("HTTP communication error"));
+  }
+  if (statusCode != 200) {
+    BOOST_THROW_EXCEPTION(HttpException("HTTP server error"));
+  }
+  std::string header;
+  while (std::getline(requestStream, header) && header != "\r")
+    ;
+
+  ndn::OBufferStream os;
+  {
+    using namespace ndn::security::transform;
+    streamSource(requestStream) >> base64Decode(true) >> streamSink(os);
+  }
+
+  auto identityCertificate = std::make_shared<security::v1::IdentityCertificate>();
+  identityCertificate->wireDecode(ndn::Block(os.buf()));
+
+  return identityCertificate;
+}
+
+int
+ndnsec_cert_install(int argc, char** argv)
+{
+  using namespace ndn;
+  using namespace ndn::security;
+  namespace po = boost::program_options;
+
+  std::string certFileName;
+  bool isSystemDefault = true;
+  bool isIdentityDefault = false;
+  bool isKeyDefault = false;
+
+  po::options_description description("General Usage\n  ndnsec cert-install [-h] [-I|K|N] cert-file\nGeneral options");
+  description.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(description).positional(p).run(), vm);
+    po::notify(vm);
+  }
+  catch (const std::exception& e) {
+    std::cerr << "ERROR: " << e.what() << std::endl;
+    return 1;
+  }
+
+  if (vm.count("help") != 0) {
+    std::cerr << description << std::endl;
+    return 0;
+  }
+
+  if (vm.count("cert-file") == 0) {
+    std::cerr << "cert_file must be specified" << std::endl;
+    std::cerr << description << std::endl;
+    return 1;
+  }
+
+  if (vm.count("identity-default") != 0) {
+    isIdentityDefault = true;
+    isSystemDefault = false;
+  }
+  else if (vm.count("key-default") != 0) {
+    isKeyDefault = true;
+    isSystemDefault = false;
+  }
+  else if (vm.count("no-default") != 0) {
+    // noDefault = true;
+    isSystemDefault = false;
+  }
+
+  shared_ptr<security::v1::IdentityCertificate> cert;
+
+  if (certFileName.find("http://") == 0) {
+    std::string host;
+    std::string port;
+    std::string path;
+
+    size_t pos = 7; // offset of "http://"
+    size_t posSlash = certFileName.find("/", pos);
+
+    if (posSlash == std::string::npos)
+      BOOST_THROW_EXCEPTION(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 (cert == nullptr)
+    return 1;
+
+  security::v1::KeyChain keyChain;
+
+  if (isSystemDefault) {
+    keyChain.addCertificateAsIdentityDefault(*cert);
+    Name keyName = cert->getPublicKeyName();
+    Name identity = keyName.getSubName(0, keyName.size() - 1);
+    keyChain.setDefaultIdentity(identity);
+  }
+  else if (isIdentityDefault) {
+    keyChain.addCertificateAsIdentityDefault(*cert);
+  }
+  else if (isKeyDefault) {
+    keyChain.addCertificateAsKeyDefault(*cert);
+  }
+  else {
+    keyChain.addCertificate(*cert);
+  }
+
+  std::cerr << "OK: certificate with name [" << cert->getName().toUri()
+            << "] has been successfully installed" << std::endl;
+
+  return 0;
+}
+
+} // namespace ndnsec
+} // namespace ndn