diff --git a/src/ca-storage/ca-memory.hpp b/src/ca-storage/ca-memory.hpp
new file mode 100644
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--- /dev/null
+++ b/src/ca-storage/ca-memory.hpp
@@ -0,0 +1,67 @@
+/* -*- 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_CA_DETAIL_CA_MEMORY_HPP
+#define NDNCERT_CA_DETAIL_CA_MEMORY_HPP
+
+#include "ca-storage.hpp"
+
+namespace ndn {
+namespace ndncert {
+
+class CaMemory : public CaStorage
+{
+public:
+  CaMemory(const Name& caName = Name(), const std::string& path = "");
+  const static std::string STORAGE_TYPE;
+
+public:
+  /**
+   * @throw if request cannot be fetched from underlying data storage
+   */
+  CaState
+  getRequest(const std::string& requestId) override;
+
+  /**
+   * @throw if there is an existing request with the same request ID
+   */
+  void
+  addRequest(const CaState& request) override;
+
+  void
+  updateRequest(const CaState& request) override;
+
+  void
+  deleteRequest(const std::string& requestId) override;
+
+  std::list<CaState>
+  listAllRequests() override;
+
+  std::list<CaState>
+  listAllRequests(const Name& caName) override;
+
+private:
+  std::map<Name, CaState> m_requests;
+};
+
+} // namespace ndncert
+} // namespace ndn
+
+#endif // NDNCERT_CA_DETAIL_CA_MEMORY_HPP