I have been tasked with finding a two factor authentication system not just for VPN, but for user systems as well. While this would be all fine and dandy if we just ran Win7, we also have Linux (usually some flavor of Debian), and OS X to think about.
Full disk encryption is the next step, but for now, we are just looking for two factor auth.
Currently we had been looking at Safenet's Authentication Service, which has an agent capable of caching One Time Password's so a user can log on offline, for Windows. For the Mac they suggest using a PAM module from Open Radius, however that has no mechanism for caching OTP's for offline authentication.
Does anyone know of a solution that will cache OTP's on OS X (and linux while I'm at it) for offline 2 factor authentication?