Update README

Author: ecqin

README

@@ -36,3 +36,4 @@ This work was supported by the DARPA CHIPS program.
 ![Alt text](https://i.postimg.cc/tJ6xFMw2/protocol.png "Protocol")
 ![alt tag](https://i.postimg.cc/tJ6xFMw2/protocol.png "Description goes here")
 [![protocol.png](https://i.postimg.cc/tJ6xFMw2/protocol.png)](https://postimg.cc/dZq3Y4qy)
+![image](https://cloud.githubusercontent.com/assets/9053854/24495974/fbf2e0cc-1547-11e7-846c-25b5fac7f6b1.png)