The Cisco Content Security and Control (CSC-SSM) module is an expansion card for the Cisco ASA 5500 Series of security appliances that scans Web, e-mail, and ftp traffic to stop content-based threats, including phishing, spyware, spam, and viruses. The CSC-SSM also controls unwanted mail and Web content. Both products use technology from Trend Micro.
Trend Micro solutions are much better then other vendors.
My 2 cents.
Regards,
Sushil