diff --git a/src/detail/profile-storage.hpp b/src/detail/profile-storage.hpp
new file mode 100644
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+++ b/src/detail/profile-storage.hpp
@@ -0,0 +1,73 @@
+/* -*- 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_CONFIGURATION_HPP
+#define NDNCERT_CONFIGURATION_HPP
+
+#include "detail/ca-profile.hpp"
+#include "name-assignment/assignment-func.hpp"
+
+namespace ndn {
+namespace ndncert {
+namespace requester {
+
+/**
+ * @brief Represents Client configuration
+ * @sa https://github.com/named-data/ndncert/wiki/Client-Configuration-Sample
+ */
+class ProfileStorage
+{
+public:
+  /**
+   * @throw std::runtime_error when config file cannot be correctly parsed.
+   */
+  void
+  load(const std::string& fileName);
+
+  /**
+   * @throw std::runtime_error when config file cannot be correctly parsed.
+   */
+  void
+  load(const JsonSection& configSection);
+
+  void
+  save(const std::string& fileName) const;
+
+  void
+  removeCaProfile(const Name& caName);
+
+  /**
+   * Be cautious. This will add a new trust anchor for requesters.
+   */
+  void
+  addCaProfile(const CaProfile& profile);
+
+  const std::list<CaProfile>&
+  getCaItems() const;
+
+private:
+  std::list<CaProfile> m_caItems;
+};
+
+} // namespace requester
+} // namespace ndncert
+} // namespace ndn
+
+#endif // NDNCERT_CONFIGURATION_HPP