diff --git a/src/security/transform/block-cipher.hpp b/src/security/transform/block-cipher.hpp
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+++ b/src/security/transform/block-cipher.hpp
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+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2016 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.
+ */
+
+#ifndef NDN_CXX_SECURITY_TRANSFORM_BLOCK_CIPHER_HPP
+#define NDN_CXX_SECURITY_TRANSFORM_BLOCK_CIPHER_HPP
+
+#include "transform-base.hpp"
+#include "../security-common.hpp"
+
+namespace ndn {
+namespace security {
+namespace transform {
+
+/**
+ * @brief The module to encrypt data using block cipher.
+ *
+ * The padding scheme of the block cipher is set to the default padding scheme of OpenSSl,
+ * which is PKCS padding.
+ */
+class BlockCipher : public Transform
+{
+public:
+  /**
+   * @brief Create a block cipher
+   *
+   * @param algo   The block cipher algorithm (e.g., EncryptMode::AES_CBC).
+   * @param op     The operation that the cipher needs to perform, e.g., CipherOperator::ENCRYPT or CipherOperator::DECRYPT
+   * @param key    The pointer to the key.
+   * @param keyLen The size of the key.
+   * @param iv     The pointer to the initial vector.
+   * @param ivLen  The length of the initial vector.
+   */
+  BlockCipher(BlockCipherAlgorithm algo, CipherOperator op,
+              const uint8_t* key, size_t keyLen,
+              const uint8_t* iv, size_t ivLen);
+
+private:
+  /**
+   * @brief Read partial transformation result (if exists) from BIO
+   */
+  virtual void
+  preTransform() final;
+
+  /**
+   * @brief Write @p data into the cipher
+   *
+   * @return number of bytes that are actually accepted
+   */
+  virtual size_t
+  convert(const uint8_t* data, size_t dataLen) final;
+
+  /**
+   * @brief Finalize the encryption
+   */
+  virtual void
+  finalize() final;
+
+  /**
+   * @brief Fill output buffer with the encryption result from BIO.
+   */
+  void
+  fillOutputBuffer();
+
+  /**
+   * @return true if the cipher does not have partial result.
+   */
+  bool
+  isConverterEmpty() const;
+
+private:
+
+  void
+  initializeAesCbc(const uint8_t* key, size_t keyLen,
+                   const uint8_t* iv, size_t ivLen,
+                   CipherOperator op);
+
+private:
+  class Impl;
+  unique_ptr<Impl> m_impl;
+};
+
+unique_ptr<Transform>
+blockCipher(BlockCipherAlgorithm algo, CipherOperator op,
+            const uint8_t* key, size_t keyLen,
+            const uint8_t* iv, size_t ivLen);
+
+} // namespace transform
+} // namespace security
+} // namespace ndn
+
+#endif // NDN_CXX_SECURITY_TRANSFORM_BLOCK_CIPHER_HPP