Move key-chain to security subdirectory.
diff --git a/tests/test-encode-decode-data.cpp b/tests/test-encode-decode-data.cpp
index 387712a..0b4aa26 100644
--- a/tests/test-encode-decode-data.cpp
+++ b/tests/test-encode-decode-data.cpp
@@ -8,7 +8,7 @@
 #include <iostream>
 #include <time.h>
 #include "../ndn-cpp/data.hpp"
-#include "../ndn-cpp/key-chain.hpp"
+#include "../ndn-cpp/security/key-chain.hpp"
 
 using namespace std;
 using namespace ndn;