diff --git a/src/security/pib/key.cpp b/src/security/pib/key.cpp
index c59a39d..51f368c 100644
--- a/src/security/pib/key.cpp
+++ b/src/security/pib/key.cpp
@@ -22,6 +22,7 @@
 #include "key.hpp"
 #include "pib-impl.hpp"
 #include "pib.hpp"
+#include "../v2/certificate.hpp"
 
 namespace ndn {
 namespace security {
@@ -196,5 +197,19 @@
     BOOST_THROW_EXCEPTION(std::domain_error("Invalid Key instance"));
 }
 
+namespace v2 {
+
+Name
+constructKeyName(const Name& identity, const name::Component& keyId)
+{
+  Name keyName = identity;
+  keyName
+    .append(Certificate::KEY_COMPONENT)
+    .append(keyId);
+  return keyName;
+}
+
+} // namespace v2
+
 } // namespace security
 } // namespace ndn