Pedantically, no. An encryption method can't depend on time, as you could just make up a date to send through the encryption/decryption function. The encrypte

Pedantically, no. An encryption method can't depend on time, as you could just make up a date to send through the encryption/decryption function. The encrypted volume handler could do this if you could guarantee it had an active agent running, and no-one powered down the system and/or copied the disk before the timeout. Which I guess is practically "no", as: 1. If someone arrests you and confiscate your equipment, they are going to switch it off immediately. 2. They would try to extract data directly from the disk instead of booting up your system. 3. I can't imagine a scenario in which you want the deadman switch to go off before you are arrested.