diff --git a/src/security/signing-info.hpp b/src/security/signing-info.hpp
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+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2013-2015 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_SECURITY_SIGNING_INFO_HPP
+#define NDN_SECURITY_SIGNING_INFO_HPP
+
+#include "../name.hpp"
+#include "../signature-info.hpp"
+#include "security-common.hpp"
+
+
+namespace ndn {
+namespace security {
+
+/**
+ * @brief Signing parameters passed to KeyChain
+ */
+class SigningInfo
+{
+public:
+  class Error : public std::runtime_error
+  {
+  public:
+    explicit
+    Error(const std::string& what)
+      : std::runtime_error(what)
+    {
+    }
+  };
+
+  enum SignerType {
+    /// @brief no signer is specified, use default setting or follow the trust schema
+    SIGNER_TYPE_NULL = 0,
+    /// @brief signer is an identity, use its default key and default certificate
+    SIGNER_TYPE_ID = 1,
+    /// @brief signer is a key, use its default certificate
+    SIGNER_TYPE_KEY = 2,
+    /// @brief signer is a certificate, use it directly
+    SIGNER_TYPE_CERT = 3,
+    /// @brief use sha256 digest, no signer needs to be specified
+    SIGNER_TYPE_SHA256 = 4
+  };
+
+public:
+  /**
+   * @brief Constructor
+   *
+   * @param signerType The type of signer
+   * @param signerName The name of signer; interpretation differs per signerType
+   * @param signatureInfo A semi-prepared SignatureInfo which contains other information except
+   *                      SignatureType and KeyLocator.  If SignatureType and KeyLocator are
+   *                      specified, they may be overwritten by KeyChain.
+   */
+  explicit
+  SigningInfo(SignerType signerType = SIGNER_TYPE_NULL,
+              const Name& signerName = EMPTY_NAME,
+              const SignatureInfo& signatureInfo = EMPTY_SIGNATURE_INFO);
+
+  /**
+   * @brief Set signer as an identity with name @p identity
+   * @post Change the signerType to SIGNER_TYPE_ID
+   */
+  void
+  setSigningIdentity(const Name& identity);
+
+  /**
+   * @brief Set signer as a key with name @p keyName
+   * @post Change the signerType to SIGNER_TYPE_KEY
+   */
+  void
+  setSigningKeyName(const Name& keyName);
+
+  /**
+   * @brief Set signer as a certificate with name @p certificateName
+   * @post Change the signerType to SIGNER_TYPE_CERT
+   */
+  void
+  setSigningCertName(const Name& certificateName);
+
+  /**
+   * @brief Set Sha256 as the signing method
+   * @post Reset signerName, also change the signerType to SIGNER_TYPE_SHA256
+   */
+  void
+  setSha256Signing();
+
+  /**
+   * @return Type of the signer
+   */
+  SignerType
+  getSignerType() const
+  {
+    return m_type;
+  }
+
+  /**
+   * @return Name of signer; interpretation differs per signerType
+   */
+  const Name&
+  getSignerName() const
+  {
+    return m_name;
+  }
+
+  /**
+   * @brief Set the digest algorithm for public key operations
+   */
+  void
+  setDigestAlgorithm(const DigestAlgorithm& algorithm)
+  {
+    m_digestAlgorithm = algorithm;
+  }
+
+  /**
+   * @return The digest algorithm for public key operations
+   */
+  DigestAlgorithm
+  getDigestAlgorithm() const
+  {
+    return m_digestAlgorithm;
+  }
+
+  /**
+   * @brief Set a semi-prepared SignatureInfo;
+   */
+  void
+  setSignatureInfo(const SignatureInfo& signatureInfo);
+
+  /**
+   * @return Semi-prepared SignatureInfo
+   */
+  const SignatureInfo&
+  getSignatureInfo() const
+  {
+    return m_info;
+  }
+
+public:
+  static const Name EMPTY_NAME;
+  static const SignatureInfo EMPTY_SIGNATURE_INFO;
+
+private:
+  SignerType m_type;
+  Name m_name;
+
+  DigestAlgorithm m_digestAlgorithm;
+
+  SignatureInfo m_info;
+};
+
+} // namespace security
+} // namespace ndn
+
+#endif // NDN_SECURITY_SIGNING_INFO_HPP