Have any of you ever used TPM to secure a VPN connection into a corporate network? I'm interested in doing two factor authentication. Ideally, only laptops that I authorize will have access to the VPN tunnel. If the laptop were to be lost or stolen I'd like to have the ability to disallow its connection by revoking a cert for example. What are your thoughts on this and what steps have you taken to get this implemented? The firewall is an ASA5510. Thanks!