this post was submitted on 12 Jan 2025
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Depending on the attacker of course. If they can read your RAM after auto-decrypt they can just take the encryption key.
Though they should be able to do that with manually decrypted drives as well, if they can access the RAM, right?
Only if they gain possession when the device is running with the drive decrypted and they keep it running the whole time. That is a lot higher bar then being able to turn the machine on at any time and then recover the key. For example if this is a laptop that you are flying with. Without auto-decryption you can simply turn it off and be very secure. With auto-decryption they can turn it on then extract the key from memory (not easy, but definitely possible and with auto-decryption they have as long as they need, including sending the device to whatever forensics lab is best equipped to extract the key).