Re: [Cfrg] Re: CCM

"Housley, Russ" <rhousley@rsasecurity.com> Fri, 06 September 2002 17:41 UTC

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From: "Housley, Russ" <rhousley@rsasecurity.com>
To: csjutla <csjutla@watson.ibm.com>
Cc: Ran Canetti <canetti@watson.ibm.com>, cfrg@ietf.org
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Date: Thu, 05 Sep 2002 20:00:49 -0400
Subject: Re: [Cfrg] Re: CCM
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Charanjit:

The document currently says that M=0 is not a valid value.  I am not sure 
what else you want added.  Are you asking for a restatement of this in the 
security considerations?

Russ


At 03:03 PM 9/5/2002 -0400, csjutla wrote:


>The CCM document should give a warning to
>users that in no condition the value M can be set to zero.
>The field for M allows for such a value, and this value
>signifies a max of 2^{-16} probability of success of message
>integrity forgery. An unsuspecting user
>may venture using the value M=0, unless informed with a warning.
>The document currently mentions that M=0 is not a valid value.
>
>Charanjit Jutla
>
>
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