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Re: MD5 To Be Considered Harmful Someday
From: Dan Kaminsky <dan () doxpara com>
Date: Wed, 08 Dec 2004 12:52:42 -0800

Paul Wouters wrote:

On Tue, 7 Dec 2004, Gandalf The White wrote:

What I am worried about is the integrity of MD5 hashed passwords.  This


It does not matter that I don't know the correct password, I have a password
that collides into the correct hash.  I can log into the system with my
generated password.


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.

It is unlikely we'll find any ASCII readable payload that collide through Wang's search technique.

--Dan


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