[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Message-ID: <8f6a58a30809290828y6cf31995j46487367e978988c@mail.gmail.com>
Date: Mon, 29 Sep 2008 17:28:03 +0200
From: "Slythers Bro" <slythers@...il.com>
To: john-users@...ts.openwall.com
Subject: Re: quite fast MD5 hashing implementation
>why can we only revserse only the round 4?
because md5 is designed for be a secure hash algorithm ( they tried)
it's all based on chaos theory
http://en.wikipedia.org/wiki/Chaos_theory
there are (cyclical) functions who create chaos, too many possibilities if
we want to reverse more
example
when on 32 bit cpu a + b = c, if you know only c = 0x01
there are 0x7fffffff possibilities for a and b (0x00
+0x01,0x02+0xffffffff,0x03+0xfffffffe,etc ...) and will be more long to
compute than a traditional brute force. and here i don't speak about the
memory needed for that.
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.
