Hi Manoj
You have Advanced Security bundle which comes with all the required security features such as IOS F/W,IDS,SSH and support for Easy VPN Client/Server.
It also supports all the encryption technologies available out there..
Fore more info you can refer the following link..
http://www.cisco.com/en/US/products/sw/iosswrel/ps5460/prod_bulletin09186a00801af451.html
You can also makse use of the Feature navigator to find out the available features in the software code..
http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp
regds