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The delta changes on a modified truecrypt volume is basically the whole file. Still acceptable for smaller volumes generally though



No, it's not. Disk encryption products like TrueCrypt do not have the properties you expect from ordinary file encryption. Only a subset of blocks are modified. It's a tradeoff, but it's the only way to make disk encryption practical.

http://en.wikipedia.org/wiki/Disk_encryption_theory


It can't be? When the container is 10 gigs and I change one file there aren't 10 gigs writes. It would last "forever."




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