also sprach Florian Weimer <fw@deneb.enyo.de> [2005.06.17.0834 +0200]: > > Encrypted filesystems are hip these days, [...] > > Are they? I thought most of the fuzz was about encrypted block > devices. That's what I mean. > > If such a bad block occurs and renders a small part of the encrypted > > file unreadable, wouldn't the entire partition and all its data be > > effectively destroyed? > > A corrupt sector corrupts the remaining part of the block. Block > sizes are much smaller than 1 GB because when part of a block is > changed, all the following bytes have to be rewritten (if a reasonable > the cipher mode is used). Of course blocks are small, e.g. 64 bytes. However, doesn't CBC or EBC make sure that every block is chained to its predecessor, making even the very last block of a file dependent on the bits of the very first block? -- Please do not send copies of list mail to me; I read the list! .''`. martin f. krafft <madduck@debian.org> : :' : proud Debian developer, admin, user, and author `. `'` `- Debian - when you have better things to do than fixing a system Invalid/expired PGP subkeys? Use subkeys.pgp.net as keyserver! DISCLAIMER: this entire message is privileged communication, intended for the sole use of its recipients only. If you read it even though you know you aren't supposed to, you're a poopy-head.
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