Re: [Full-Disclosure] MD5 hash cracking service

[Dave King <dave@xxxxxxxxxxxxx>]

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
www.thesecure.net

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 12.3.4.5 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 12.3.4.5?
>
> Still, bravo to you for setting it up :-)
>
> G
>
> On or about 2004.07.01 19:03:33 +0000, md5er (info@xxxxxxxxxxxxxxxx) 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
> >
> >
> >
> > Regards, 
> >
> > staff
> >
> >
> > _______________________________________________
> > Full-Disclosure - We believe in it.
> > Charter: http://lists.netsys.com/full-disclosure-charter.html
> >    
>
>  


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