diff --git a/src/security/transform/bool-sink.cpp b/src/security/transform/bool-sink.cpp
new file mode 100644
index 0000000..1c45c76
--- /dev/null
+++ b/src/security/transform/bool-sink.cpp
@@ -0,0 +1,58 @@
+/* -*- 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.
+ */
+
+#include "bool-sink.hpp"
+
+namespace ndn {
+namespace security {
+namespace transform {
+
+BoolSink::BoolSink(bool& value)
+  : m_hasValue(false)
+  , m_value(value)
+{
+}
+
+size_t
+BoolSink::doWrite(const uint8_t* buf, size_t size)
+{
+  if (!m_hasValue && size > 0) {
+    m_value = (buf[0] != 0);
+    m_hasValue = true;
+  }
+  return size;
+}
+
+void
+BoolSink::doEnd()
+{
+  // nothing to do.
+}
+
+unique_ptr<Sink>
+boolSink(bool& value)
+{
+  return make_unique<BoolSink>(value);
+}
+
+} // namespace transform
+} // namespace security
+} // namespace ndn