diff --git a/src/protocol-detail/info.cpp b/src/protocol-detail/info.cpp
new file mode 100644
index 0000000..93bd7b7
--- /dev/null
+++ b/src/protocol-detail/info.cpp
@@ -0,0 +1,72 @@
+/* -*- 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 "info.hpp"
+
+namespace ndn {
+namespace ndncert {
+
+Block
+INFO::encodeContentFromCAConfig(const CaConfig& caConfig, const security::v2::Certificate& certificate)
+{
+  auto content = makeEmptyBlock(tlv::Content);
+  content.push_back(makeNestedBlock(tlv_ca_prefix, caConfig.m_caPrefix));
+  content.push_back(makeStringBlock(tlv_ca_info, caConfig.m_caInfo));
+  for (const auto& key : caConfig.m_probeParameterKeys) {
+    content.push_back(makeStringBlock(tlv_parameter_key, key));
+  }
+  content.push_back(makeNonNegativeIntegerBlock(tlv_max_validity_period, caConfig.m_maxValidityPeriod.count()));
+  content.push_back(makeNestedBlock(tlv_ca_certificate, certificate));
+  content.parse();
+  return content;
+}
+
+ClientCaItem
+INFO::decodeClientConfigFromContent(const Block& block)
+{
+  ClientCaItem result;
+  block.parse();
+  for (auto const& item : block.elements()) {
+    if (item.type() == tlv_ca_prefix) {
+      item.parse();
+      result.m_caPrefix.wireDecode(item.get(tlv::Name));
+    }
+    else if (item.type() == tlv_ca_info) {
+      result.m_caInfo = readString(item);
+    }
+    else if (item.type() == tlv_parameter_key) {
+      result.m_probeParameterKeys.push_back(readString(item));
+    }
+    else if (item.type() == tlv_max_validity_period) {
+      result.m_maxValidityPeriod = time::seconds(readNonNegativeInteger(item));
+    }
+    else if (item.type() == tlv_ca_certificate) {
+      item.parse();
+      result.m_anchor.wireDecode(item.get(tlv::Data));
+    }
+    else {
+      continue;
+    }
+  }
+  return result;
+}
+
+}  // namespace ndncert
+}  // namespace ndn
\ No newline at end of file
diff --git a/src/protocol-detail/info.hpp b/src/protocol-detail/info.hpp
new file mode 100644
index 0000000..89a907b
--- /dev/null
+++ b/src/protocol-detail/info.hpp
@@ -0,0 +1,42 @@
+/* -*- 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.
+ */
+
+#ifndef NDNCERT_PROTOCOL_DETAIL_HPP
+#define NDNCERT_PROTOCOL_DETAIL_HPP
+
+#include "../ca-config.hpp"
+#include "../client-config.hpp"
+
+namespace ndn {
+namespace ndncert {
+
+class INFO {
+public:
+  static Block
+  encodeContentFromCAConfig(const CaConfig& caConfig, const security::v2::Certificate& certificate);
+
+  static ClientCaItem
+  decodeClientConfigFromContent(const Block& block);
+};
+
+}  // namespace ndncert
+}  // namespace ndn
+
+#endif // NDNCERT_PROTOCOL_DETAIL_HPP
\ No newline at end of file