Update README.md

Author: artemkin

README.md

@@ -1,3 +1,13 @@
 # Cisco VPN Client Password Decoder
 
-Decoder for password encoding of Cisco VPN client
+Pure javascript decoder for password encoding of Cisco VPN client.
+
+Usually, you need to decrypt group password stored in *.PCF files to setup [native Cisco VPN connection in Mac OS X][1]. 
+
+In contrast to other implementations, this decoder does everything in a browser, so a password never leaves your computer.
+
+[<h3>Decode group password online</h3>][2]
+
+
+[1]: http://anders.com/guides/native-cisco-vpn-on-mac-os-x/
+[2]: http://artemkin.github.io/cisco-password-decoder