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We’ve featured a Bluetooth-based program that automatically locks Windows PCs when the user walks away. Here’s another approach to automatically locking a computer. While the Bluetooth-based program relied on proximity, Didier Stevens’ program LockIfNotHot works in conjunction with an IR thermometer to detect changes in the surrounding temperature.…

Currently in beta, Phoenix Freeze is a program that allows users to use thie Bluetooth-enabled mobile phones as “keys” to their computers. After pairing your computer with your phone, Phoenix Freeze… will automatically lock the computer as you go away from the computer, and it will unlock the computer as