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Article #1185

shar corruption on TRN posting

#1185
From: Alastair Rae
Date: Wed, 05 Dec 1990 16:01
23 lines
1369 bytes
I've just downloaded TRN from comp.sources.unix.  13 of its 14 parts
were coherent shell-archives but part 9's tail-end was wrong. This
was different to all the other parts which output a sequence number to
a temp file so as to keep the shars in order.

OK, I can get round that but it got me thinking. I wondered what
happened to corrupt the shar? Maybe the posting was corrupt in the
first place but my main worry is this:

    How can I be certain that a shar archive is what it claims to be?

    How do I know that it hasn't been interfered with along the net?

    When some tempting piece of software lands up at my end of the net,
    how do I know that it's safe to unpack, never mind compile & run?

Am I just being paranoid?

-- 
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Alastair Rae  uunet!ukc!mcdd1!ar  (+44 442 272071)
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!rex!rouge!wuarchive!zaphod.mps.ohio-state.edu!think.com!mintaka!bloom-beacon!eru!hagbard!sunic!mcsun!ukc!mcdd1!ar

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!rex!rouge!wuarchive!zaphod.mps.ohio-state.edu!think.com!mintaka!bloom-beacon!eru!hagbard!sunic!mcsun!ukc!mcdd1!ar
From: ar@mcdd1 (Alastair Rae)
Newsgroups: comp.sources.d,news.admin
Subject: shar corruption on TRN posting
Keywords: shar, corruption, hacking?
Message-ID: <140@mx-1>
Date: 5 Dec 90 16:01:44 GMT
Organization: McDonnell Douglas,Hemel Hempstead,UK
Lines: 23