[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <48E0509C.2080901@banquise.net>
Date: Mon, 29 Sep 2008 05:50:52 +0200
From: Simon Marechal <simon@...quise.net>
To: john-users@...ts.openwall.com
Subject: Re: quite fast MD5 hashing implementation
Bucsay Balázs a écrit :
> Hello!
>
> I dont see the solution here, maybe because i'm "blind" :)
> a63 -= F(b64,c64,d64) + x + ac;
> You can tell here the a63, if you know the "x", but the x is the part of
> the right password, so if you know x, you will know something about the
> password. Am i right? I hope im not and i can learn a new trick :)
Oh I see your problem. Actually you pretend that you do know the
password, except for the first four bytes. Then you somehow "know" x,
until you have to reverse K[0], which is at the start of the last round.
That way you save 25% while the last part of the passwords you are
testing stays the same.
--
To unsubscribe, e-mail john-users-unsubscribe@...ts.openwall.com and reply
to the automated confirmation request that will be sent to you.
Powered by blists - more mailing lists
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
