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:
Actually, this greatly increases the chance of a collision. 123456789 will collide with 123456780.Can't we just truncate the password to 8 characters like in the old daysbefore 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.
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. Paul
Current thread:
- Re: MD5 To Be Considered Harmful Someday, (continued)
- Re: MD5 To Be Considered Harmful Someday Tim (Dec 08)
- Re: MD5 To Be Considered Harmful Someday Dragos Ruiu (Dec 08)
- Re: MD5 To Be Considered Harmful Someday David F. Skoll (Dec 08)
- Re: MD5 To Be Considered Harmful Someday Joel Maslak (Dec 08)
- Re: MD5 To Be Considered Harmful Someday Steve Friedl (Dec 08)
- RE: MD5 To Be Considered Harmful Someday David Schwartz (Dec 08)
- Re: MD5 To Be Considered Harmful Someday Gandalf The White (Dec 08)
- Re: MD5 To Be Considered Harmful Someday Keith Oxenrider (Dec 08)
- Re: MD5 To Be Considered Harmful Someday Paul Wouters (Dec 08)
- Re: MD5 To Be Considered Harmful Someday Dan Kaminsky (Dec 08)
- Re: MD5 To Be Considered Harmful Someday Paul Wouters (Dec 08)
- Re: MD5 To Be Considered Harmful Someday Adam Shostack (Dec 09)
- Re: MD5 To Be Considered Harmful Someday Tim (Dec 08)
- Re: MD5 To Be Considered Harmful Someday Solar Designer (Dec 08)
- Re: MD5 To Be Considered Harmful Someday Dan Kaminsky (Dec 08)
- Re: MD5 To Be Considered Harmful Someday Pavel Kankovsky (Dec 09)
- Re: MD5 To Be Considered Harmful Someday Solar Designer (Dec 13)
- Re: MD5 To Be Considered Harmful Someday George Georgalis (Dec 08)
- Re: MD5 To Be Considered Harmful Someday Dan Kaminsky (Dec 08)
- Re: MD5 To Be Considered Harmful Today Dan Kaminsky (Dec 08)