diff --git a/src/security/v2/validator-config/name-relation.cpp b/src/security/v2/validator-config/name-relation.cpp
new file mode 100644
index 0000000..ad65e9a
--- /dev/null
+++ b/src/security/v2/validator-config/name-relation.cpp
@@ -0,0 +1,79 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2013-2017 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 "name-relation.hpp"
+
+#include <boost/algorithm/string.hpp>
+
+namespace ndn {
+namespace security {
+namespace v2 {
+namespace validator_config {
+
+std::ostream&
+operator<<(std::ostream& os, NameRelation relation)
+{
+  switch (relation)  {
+    case NameRelation::EQUAL:
+      return os << "equal";
+    case NameRelation::IS_PREFIX_OF:
+      return os << "is-prefix-of";
+    case NameRelation::IS_STRICT_PREFIX_OF:
+      return os << "is-strict-prefix-of";
+  }
+  return os;
+}
+
+bool
+checkNameRelation(NameRelation relation, const Name& name1, const Name& name2)
+{
+  switch (relation)  {
+    case NameRelation::EQUAL:
+      return name1 == name2;
+    case NameRelation::IS_PREFIX_OF:
+      return name1.isPrefixOf(name2);
+    case NameRelation::IS_STRICT_PREFIX_OF:
+      return name1.isPrefixOf(name2) && name1.size() < name2.size();
+  }
+  return false;
+}
+
+NameRelation
+getNameRelationFromString(const std::string& relationString)
+{
+  if (boost::iequals(relationString, "equal")) {
+    return NameRelation::EQUAL;
+  }
+  else if (boost::iequals(relationString, "is-prefix-of")) {
+    return NameRelation::IS_PREFIX_OF;
+  }
+  else if (boost::iequals(relationString, "is-strict-prefix-of")) {
+    return NameRelation::IS_STRICT_PREFIX_OF;
+  }
+  else {
+    BOOST_THROW_EXCEPTION(Error("Unsupported relation: " + relationString));
+  }
+}
+
+} // namespace validator_config
+} // namespace v2
+} // namespace security
+} // namespace ndn