Windows Phone Thoughts: Phoenix Freeze Bluetooth Authentication

"Often the best ideas are the simplest. A laptop which locks itself as you walk away with your Blackberry® or iPhone™ and unlocks as you return. Cool, easy, secure! Just think of the benefits: One: More security - Freeze is designed to lock an XP or Vista based laptop when you walk away from it and unlock it when you return. All you need to activate the service is a Bluetooth® enabled mobile phone. Once you step out of the "zone of safety" your laptop is locked and your data is safe."

On the surface this looks pretty cool, I've seen versions of this idea using proprietary hardware, but letting it use a Bluetooth device you already have is a unique way to deal with it. Probably more than adequate for the home user, but without some further research, I'm not sure Bluetooth security is robust enough to make this the only form of authentication used on a corporate network. However, as part of a well-designed multi-factor authentication system, it certainly has potential. Notebooks.com has a video showing how this works.