3 ms·
Is that true? If I use TrueCrypt to encrypt my entire 200GB hard drive, does it have to update every block on the disk when I write to a single file?
by mbrubeck 17y ago
Is that true? If I use TrueCrypt to encrypt my entire 200GB hard drive, does it have to update every block on the disk when I write to a single file?
- iuybuyvvyu 17y agoIdeally it should otherwise you are vulnerable to a range of differential attacks. In practice it's a compromise between performance and security. It might very well touch a large number of blocks to stop an attacker working out where on a disk a particular file is. There are a bunch of rsync freindly crypto implementations that minimize this effect
- Devilboy 17y agoHow exactly would an attacker have enough access to your encrypted data to do a diff attack? If he has physical access to the machine you're going to be compromised regardless of the details of the encryption scheme.
- Gormo 17y agoSome of the info in the TrueCrypt FAQ (http://www.truecrypt.org/faq http://www.truecrypt.org/faq) leads me to believe that each block is independently encrypted. See question "What will happen when a part of a TrueCrypt volume becomes corrupted?"