-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Yoav 
Nir
Sent: Saturday, July 21, 2012 1:51 PM
To: Dan Harkins
Cc: [email protected]; Johannes Merkle; Tero Kivinen
Subject: Re: [IPsec] Using ECC Brainpool curves with ipsec


> Not much, but not all PRF functions are hashes. What hash will you use if 
> your PRF is AES-XCBC? What if it's GHash?
> Sure we could extend both those to be hash functions (just use AES-XCBC with 
> a fixed key) but we've never done this
> before, and I don't have any idea if the cryptographers will approve.

Cryptographers would certainly not approve; it's easy to generate preimages for 
AES-XCBC or GHash with a public key.


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