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From: shopov@ee.su.oz.au (Sacha Shopov)
Newsgroups: comp.binaries.ibm.pc.d,sci.crypt
Subject: compression sources and miscellaneous
Summary: wanted: arj/zip/lzh source/algorithms
Message-ID: <1991Feb9.111235.13379@metro.ucc.su.OZ.AU>
Date: 9 Feb 91 11:12:35 GMT
Sender: news@metro.ucc.su.OZ.AU
Reply-To: shopov@ee.su.oz.au (Sacha Shopov)
Organization: Electrical Engineering, The University of Sydney, Australia
Lines: 30
Nntp-Posting-Host: 129.78.13.33

Hi.

I've a few requests if I may ask.

Arj020 - a compression utility that uses simple exclusive-or operations
manages to get such a tight packed compression. I was impressed. It was
the tightest for a while, and still looks promising. Has there been an
upgrade version to it yet, and/or if so/not when/where. :)

On that note, can someone direct me to the source code of these
compression utilities if they are avaliable. Not just arj, but other
common ibm-style archivers.

Also, most of these offer an encryption method built in, ie pkzip -s,
arc -g, etc. I cant find a mention of which algorith they use. Most
just ignore that section. DES is meant to be the algorithm mostly secure
which people often use for security, but I can't find out if they are
built into any of these. 

Thats about it. All help appreciated. Thanks.

Sachz.
shopov@ee.su.oz.au
Down Under is the place to be. :)

nb. a utility like norton5 has DES avaliable already implemented.
just a note. Also, preferably if the above is compatible with other
machine types.

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