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Re: truncation

To: rrglenn@erols.com
Subject: Re: truncation
From: ho@earth.hpc.org (Hilarie Orman)
Date: Sun, 9 Mar 1997 20:19:15 -0500
Cc: ipsec@tis.com
In-reply-to: Yourmessage <199703062049.NAA10706@baskerville.CS.Arizona.EDU>
Sender: owner-ipsec@ex.tis.com

>   Yes, the HMAC hash's will be truncated to 96 bits.  I hope to have the
>   "new" AH-HMAC drafts out sometime next week.  I can't speak for
>   Jim Hughes draft.

>   Rob G.

>   Rob Adams wrote:
>   > 
>   > Did we ever decide definitively on truncating MD5 and SHA hash's to 96 bits?
>   > I think we did but I just want to be clear.
>   > 
>   > Also, how does this apply to the Hughes Combined transform?  Do we truncate
>   > the MD5 hash there also?  I hope so for uniformity's sake.
>   > 
>   > -Rob

The MD5 truncation is not recommended.

Hilarie

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