* martin f. krafft: > also sprach Florian Weimer <[EMAIL PROTECTED]> [2005.06.17.0848 +0200]: >> These are *cipher* blocks, and they are chained only within >> a *block device* block. > > Who guarantees that? If Cipherblock CB_x depends on CB_(x-1), then > CB_last will indirectly depend on CB_first. If the data are large > enough to span multiple block device blocks, damage to the beginning > of the cipherfile makes the rest of the file unusable, no?
For each device block, a constant, block-specific IV is used. Device blocks are not chained together. The block device doesn't know anything about files, anyway. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
