Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!wuarchive!uunet!mcsun!hp4nl!htsa!miquels
From: miquels@htsa.htsa.aha.nl (Miquel van Smoorenburg)
Newsgroups: comp.os.minix
Subject: Re: password encoding (minix)
Message-ID: <116@htsa.htsa.aha.nl>
Date: 11 Jun 91 08:34:51 GMT
References: <55929@nigel.ee.udel.edu>
Organization: Polytechnical Institute AHA-TMF, Amsterdam, The Netherlands
Lines: 36

In article <55929@nigel.ee.udel.edu> jac@unlisys.in-berlin.de (Joerg Conradt) writes:
->> Yes, the crypt function used by Minix is reversable. A program that
->> does it was posted by Norbert Schlenker in June 90. Fred van Kempen
->> then posted a different algorithm, that has not been broken until now
->> (may just because nobody tried). Both articles are available via ftp
->> from ftp.vmars.tuwien.ac.at. (If there is enough interest, I will also
->> repost them)
->> 
->> --
->> |    _  | Peter J. Holzer                       | Think of it   |
->> | |_|_) | Technical University Vienna           | as evolution  |
->> | | |   | Dept. for Real-Time Systems           | in action!    |
->> | __/   | hp@vmars.tuwien.ac.at                 |     Tony Rand |
->> 
->
->Hallo Peter,
->sag mal, is das in V1.5. immer noch so? also is der immer noch
->umkehrbar? oder war das nur mal (so um 1.3...)
->wenn ja, schickst du mir mal die beiden artikel zu- speziell
->den mit dem neuen crypt?
->danke schon mal - Joerg
->--
->Joerg Conradt   Berlin, Germany  ||  UUCP: jac@unlisys.in-berlin.de
The newest crypt posted by Fred van Kempen, is a C-version of a Pascal
function, which is described by Andrew S. Tanenbaum in his book
"Computer Networks". This is the ORIGINAL Unix crypt, a modified
version of DES. If you can break this and you're clever enough, you'll
probably never have to work a day in your life again :-).
Miquel.
PS reversing v1.3 crypt is a trivial excercise{, even for someone
who has to do the second grade AGAIN (me!) :-).
-- 
---
%    Miquel van Smoorenburg, Baljuwstraat 20, 2461 SL Langeraar, Holland    %
%  miquels@drinkel.nl.mugnet.org         miquels@maestro.htsa.aha.nl        %
%              God is real, unless declared integer..                       %