[85669] in cryptography@c2.net mail archive
Re: AES128-CBC Question
daemon@ATHENA.MIT.EDU (Nicolas Williams)
Thu Apr 19 22:40:51 2007
Date: Thu, 19 Apr 2007 16:51:50 -0500
From: Nicolas Williams <Nicolas.Williams@sun.com>
To: Sidney Markowitz <sidney@sidney.com>
Cc: Aram Perez <aramperez@mac.com>, Cryptography <cryptography@metzdowd.com>
In-Reply-To: <4627D780.6040301@sidney.com>
On Fri, Apr 20, 2007 at 08:56:32AM +1200, Sidney Markowitz wrote:
> Aram Perez wrote, On 19/4/07 6:29 PM:
> > Is there any danger in using AES128-CBC with a fixed IV of all zeros?
>
> Here is some discussion about doing this, in the context of PGP doing
> just that and why PGP inserts random characters at the begining of the
> plaintext.
Kerberos V calls this a "confounder" (a block of randomly selected bits
that is prepended to plaintext prior to encryption).
Nico
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