Home page logo

bugtraq logo Bugtraq mailing list archives

Re: MD5 To Be Considered Harmful Someday
From: Paul Wouters <paul () xtdnet nl>
Date: Wed, 8 Dec 2004 22:05:50 +0100 (MET)

On Wed, 8 Dec 2004, Dan Kaminsky wrote:

Can't we just truncate the password to 8 characters like in the old days
before doing the MD5 hash? It will greatly reduce the chance of a collision.
In fact, I am not even sure my systems don't do this already.

Actually, this greatly increases the chance of a collision. 123456789 will collide with 123456780.

I was talking about limiting the input, not the output. I assumed it would
be more difficult to find a collision when there are less degrees of freedom
in the input.

What I realised after my mail though, is that it is probably pretty easy to
prebuild a dictionary of all 8 character combinations and their MD5 sums.


  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]