-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi James,
To follow up on this, TrueCrypt uses XTS mode, which as far as I can tell is designed to protect against an adversary who can read multiple versions of the ciphertext: https://en.wikipedia.org/wiki/Disk_encryption_theory#Problem_definition However, if a flash storage device contains a journalling filesystem or the controller chip uses journalling, the adversary may be able to tell when each block of the encrypted volume was updated, which might reveal the presence of a hidden volume: http://www.truecrypt.org/docs/?s=journaling-file-systems Does anyone on the list know whether flash controller chips use journalling? I'm guessing they might because YAFFS does. Cheers, Michael On 17/07/12 00:48, James Vasile wrote: > Thanks, Michael. That's a good thought. I hadn't factored in the > notion of having multiple versions of the ciphertext. I'll take a > look at some disk-encryption systems with that in mind. > > -J -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iQEcBAEBAgAGBQJQCsSDAAoJEBEET9GfxSfMlCIH/1Zh64P75+Y1+aDL5OdW+xTy XlvOQJ6RF5YUANYKfwGEli6oA+3cEkLsUlL1ZGKSMX3o4whNFP3TEKA1CHOGme7j gw50ZIk+q2zxU9c3u4AiOsEFpmixhj01GjPOfuQFCQWdGSB+qVUtWKWkALVk8axe AKQ0b0jaZnRmwgczA4DVqydJjh20sgC/SFKTS675xGwon27wYsS2pIl93Zajemwp 0L75e9FbzgVpGefIieGND2J4vcUlsqMcNqY8ENPtSmz+B8SH99ZjwfjgEm3mpBuG b62p3kdeI4vNXs5Hr5x6da41sUcjKiJIR0SOPfVV3+CFIf8PARXM0NNgeFMRMw0= =5Dj4 -----END PGP SIGNATURE----- _______________________________________________ liberationtech mailing list liberationtech@lists.stanford.edu Should you need to change your subscription options, please go to: https://mailman.stanford.edu/mailman/listinfo/liberationtech If you would like to receive a daily digest, click "yes" (once you click above) next to "would you like to receive list mail batched in a daily digest?" You will need the user name and password you receive from the list moderator in monthly reminders. You may ask for a reminder here: https://mailman.stanford.edu/mailman/listinfo/liberationtech Should you need immediate assistance, please contact the list moderator. Please don't forget to follow us on http://twitter.com/#!/Liberationtech
