diff --git a/doc/index.rst b/doc/index.rst
index 053f362..fbc4d35 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -6,7 +6,9 @@
 
 .. _NDNx Control Center: http://named-data.net/download/
 
- and your default key and certificate have been generated and installed . 
+.. image:: https://raw.github.com/bruinfish/ChronoChat-V2/master/doc/img/ncc.png
+
+and your default key and certificate have been generated and installed . 
 
 Step 1. When you open ChronoChat App, you will see a contact panel as shown below.