Re: "incrementing" ecb mode
From: Eris Pluvia (eris_pluviaNOSPAM_at_yahoo.es)
Date: 10/18/03
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Date: Sat, 18 Oct 2003 00:11:39 +0200
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Peter Fairbrother:
> Are there any security problems with using a sort-of incrementing ecb
> mode, like this:
>
> 1) Every file is encrypted with a different starting key.
>
> 2) Each block in a file is encrypted with an incremented key, ie each
> block's key is 1 more than the previous block's key.
My option is rehashing the key each block. The loss of performance is less
than this caused by rescheduling.
- --
Eris Pluvia
http://pgp.rediris.es:11371/pks/lookup?op=get&search=0x18BE286C
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