Home page logo

fulldisclosure logo Full Disclosure mailing list archives

Re: MD5 hash cracking service
From: Dave King <dave () davewking com>
Date: Fri, 02 Jul 2004 01:01:38 -0600

It's true that MD5 hashes are one way. This simply means you can't do math on them and get back to what you started with, as you can with encryption. Basically what this site does is make a huge sorted list of MD5 hashes. It can then quickly search through them and find your hash. Since the same plaintext always makes the same MD5 hash, then you've got your plaintext. It's bascially a memory vs. time tradeoff. I agree with you about potential problems publically posting stuff to be cracked, be leary. 150 hashes a day is pretty fast though. . .

Dave King

Gregory A. Gilliss wrote:

Interesting, since MD5 hashes are supposed to be "one way", are they not?

I've often discussed setting up an "online cracking service" (think Alex
Moffet's crack seriously networked a la Beowulf with a Web interface).
Aside from the technical challenges of setting up and maintaining such
a project, the obvious issue, from a security perspective, would be trust.
For example, if I know that Alice connected from and supplied a hash/password, and I retained the unencrypted hash/password, would I
not now (potentially) have access to "something" (maybe accessible, maybe
privileged, maybe not) at

Still, bravo to you for setting it up :-)


On or about 2004.07.01 19:03:33 +0000, md5er (info () passcracking com) said:

I've set up a quick website and system to crack md5 hashes online using Rainbow tables. The project is using 
RainbowCrack and currently ~47 Gb of tables. At the moment it can crack hashes of lowercase letters and/or numbers up to 8 
characters long.

The cracking service is free

If you are interested you can check out the site here: http://passcracking.com


Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html

Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html

  By Date           By Thread  

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