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Re: Cisco and the tobacco industry

  • From: Jeffrey I. Schiller
  • Date: Sat Jul 30 21:54:29 2005
  • Openpgp: id=F414952B

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Tony Li wrote:
> True, but you ARE suggesting that Cisco produce a binary patch, to a
> possibly compressed image.

Like I said, it isn't trivial. For example, the patching software (this
would require memory) could uncompress the image, patch it and
recompress the result. As a double check it can verify that the newly
patched compressed image has the correct checksum (because the
compression is completely deterministic, you can do this). But this is
getting into details that I, having no access to source nor the way the
binary is put together, am not competent to go into in any authoritative
way. However I do believe this problem can be solved.

It may indeed be technically easier to distribute a whole new image.
However I suspect this is harder from a management, legal point of view.
A patch tool, when made publically available, doesn't give away as much
information as does a whole image. And you should make security fixes
readily available, to the point that anyone on the planet might download
and examine them.

However my main point is that upgrading, at least for the provision of
security patches needs to be much easier then it is today. Both for the
professionally managed networks as well as the SOHO and residential market.

			-Jeff

P.S. I am going out of my way to "plain text" sign these messages rather
then sending PGP/MIME. PGP/MIME is the more modern technology.
- --
=============================================================================
Jeffrey I. Schiller
MIT Network Manager
Information Services and Technology
Massachusetts Institute of Technology
77 Massachusetts Avenue  Room W92-190
Cambridge, MA 02139-4307
617.253.0161 - Voice
[email protected]
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