[14270] in cryptography@c2.net mail archive
Re: Can Eve repeat?
daemon@ATHENA.MIT.EDU (David Honig)
Wed Sep 24 20:03:06 2003
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
Date: Wed, 24 Sep 2003 14:48:19 -0700
To: Greg Troxel <gdt@ir.bbn.com>, iang@systemics.com
From: David Honig <dahonig@cox.net>
Cc: cryptography@metzdowd.com
In-Reply-To: <rmi65ji74b2.fsf@fnord.ir.bbn.com>
At 08:34 AM 9/24/03 -0400, Greg Troxel wrote:
>A consequence of the infinite CPU assumption is that ciphers like AES,
>hash functions like SHA-1, etc. are all considered useless by the
>purist QC community. Thus, people talk about doing authentication
>with families of universal hash functions. This has the practical
>problem that the original (courier-transported) secret keying material
>for authentication is used up, and the typical scheme talked about is
>using some of the agreed-upon QKD bits to replenish the authentication
>keying material. This does not seem very robust.
Those couriers are carrying one-time pad CDs, in a QC world.
Do not try to pet their dogs, BTW.
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