diff --git a/src/protocol-detail/new.cpp b/src/protocol-detail/new.cpp
new file mode 100644
index 0000000..27bbf0a
--- /dev/null
+++ b/src/protocol-detail/new.cpp
@@ -0,0 +1,75 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2017-2020, Regents of the University of California.
+ *
+ * This file is part of ndncert, a certificate management system based on NDN.
+ *
+ * ndncert is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation, either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * ndncert 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 General Public License for more details.
+ *
+ * You should have received copies of the GNU General Public License along with
+ * ndncert, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * See AUTHORS.md for complete list of ndncert authors and contributors.
+ */
+
+#include "new.hpp"
+#include "../logging.hpp"
+#include "../ndncert-common.hpp"
+
+#include <ndn-cxx/security/transform/base64-encode.hpp>
+#include <ndn-cxx/security/transform/buffer-source.hpp>
+#include <ndn-cxx/security/transform/stream-sink.hpp>
+#include <ndn-cxx/util/logger.hpp>
+
+namespace ndn {
+namespace ndncert {
+
+_LOG_INIT(ndncert.client);
+
+Block
+NEW::encodeApplicationParameters(const std::string& ecdhPub, const security::v2::Certificate& certRequest,
+                                const shared_ptr<Data>& probeToken)
+{
+  Block request = makeEmptyBlock(tlv::ApplicationParameters);
+  std::stringstream ss;
+  try {
+    security::transform::bufferSource(certRequest.wireEncode().wire(), certRequest.wireEncode().size())
+    >> security::transform::base64Encode(false)
+    >> security::transform::streamSink(ss);
+  }
+  catch (const security::transform::Error& e) {
+    _LOG_ERROR("Cannot convert self-signed cert into BASE64 string " << e.what());
+    return request;
+  }
+
+  request.push_back(makeStringBlock(tlv_ecdh_pub, ecdhPub));
+  request.push_back(makeNestedBlock(tlv_cert_request, certRequest));
+  request.parse();
+  return request;
+}
+
+Block
+NEW::encodeDataContent(const std::string& ecdhKey, const std::string& salt,
+                             const CertificateRequest& request,
+                             const std::list<std::string>& challenges)
+{
+  Block response = makeEmptyBlock(tlv::Content);
+  response.push_back(makeStringBlock(tlv_ecdh_pub, ecdhKey));
+  response.push_back(makeStringBlock(tlv_salt, salt));
+  response.push_back(makeStringBlock(tlv_request_id, request.m_requestId));
+  response.push_back(makeNonNegativeIntegerBlock(tlv_status, request.m_status));
+  for (const auto& entry: challenges) {
+    response.push_back(makeStringBlock(tlv_challenge, entry));
+  }
+  response.parse();
+  return response;
+}
+
+}  // namespace ndncert
+}  // namespace ndn
\ No newline at end of file