Dick Middleton wrote:
Andreas Grassl wrote:i encrypted a partition with cryptsetup -c aes-cbc-essiv:sha256 -y -s 256 luksFormat /dev/sda6 but forgot to wipe the data first :-) now i thought to write simply a zero-file on the encrypted partition to fill the whole space.Why not just fill the file system with data - copy files from somewhere, anywhere, until it's full. Then delete them again. That way just about all of the partition will be rewritten with encrypted data.
Better yet, get it from the kind-of random number generator: dd if=/dev/urandom of=/mountpoint/delme.dat (/dev/random will work too, but it's a lot slower.) -Luke
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