1996-06-30 - Re: rsync and md4

Header Data

From: Andrew Tridgell <tridge@arvidsjaur.anu.edu.au>
To: ogren@cris.com
Message Hash: 83b24059085a10ab36f3d01ff00f026ca115febcc99914b4bdc7e56b7f9e8505
Message ID: <96Jun30.110048+1000est.65037-6357+787@arvidsjaur.anu.edu.au>
Reply To: <199606300025.UAA04020@darius.cris.com>
UTC Datetime: 1996-06-30 07:01:44 UTC
Raw Date: Sun, 30 Jun 1996 15:01:44 +0800

Raw message

From: Andrew Tridgell <tridge@arvidsjaur.anu.edu.au>
Date: Sun, 30 Jun 1996 15:01:44 +0800
To: ogren@cris.com
Subject: Re: rsync and md4
In-Reply-To: <199606300025.UAA04020@darius.cris.com>
Message-ID: <96Jun30.110048+1000est.65037-6357+787@arvidsjaur.anu.edu.au>
MIME-Version: 1.0
Content-Type: text/plain

> MD4 is the fastest hash I am aware of.  However, there has been some 
> successful attacks against two rounds of MD4.  Although this is not to 
> suggest that MD4 is insecure, MD5 almost as fast (~1.3 times slower) and 
> more secure.

I thought md5 was slower than that, but I'm only going by my
(addmitedly poor) memory of some comments in the tripwire docs. I'll
give it a go sometime.

One annoying think about the md4 implementation that I have is that on
little endian machines it byte reverses the words in the buffer its
hashing so I need to make a copy of the buffer each time. Is there a
version of md4 that doesn't do this?

Cheers, Andrew