Cipher mode extensions

[Michal Ludvig]

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Michael Halcrow wrote:
> On Fri, Aug 20, 2004 at 03:07:17PM -0500, Michael Halcrow wrote:
>
>>On Fri, Aug 20, 2004 at 09:31:52PM +0200, Michal Ludvig wrote:
>>
>>>no keys nor ciphers involved. This doesn't sound like a good
>>>idea... Or am I missing something?
>>
>>My goal is to make it difficult to decipher *any* portion of the
>>plaintext without the key.
>
>
> Er, ciphertext

Indeed, but how does it apply to the last partial block? To me it looks
like it is enough to XOR the tail with the beginning of the previous
block to get the plaintext of the end of the file...

Michal Ludvig
- --
SUSE Labs                    mludvig at suse.cz
(+420) 296.545.373        http://www.suse.cz
Personal homepage http://www.logix.cz/michal
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