With BestCrypt you allocate a portion (container) of free space on your drive where you keep all your sensitive data in encrypted form, creating a virtual drive in your system that you work with as you would any other drive. BestCrypt uses strong encryption algorithms, including Blowfish, GOST, and DES. Features include a time-out option, hot keys, a wiping utility, and the ability to add your own encryption algorithm.
More info:
hxxp://www.jetico.com/