Re: Obfuscated stored procedures (was Re: Oracle and Postgresql)

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От David Fetter
Тема Re: Obfuscated stored procedures (was Re: Oracle and Postgresql)
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Msg-id 20080924150518.GA844@fetter.org
обсуждение исходный текст
Ответ на Re: Obfuscated stored procedures (was Re: Oracle and Postgresql)  (Glyn Astill <glynastill@yahoo.co.uk>)
Ответы Re: Obfuscated stored procedures (was Re: Oracle and Postgresql)  (Bruce Momjian <bruce@momjian.us>)
Re: Obfuscated stored procedures (was Re: Oracle and Postgresql)  (Andrew Sullivan <ajs@commandprompt.com>)
Re: Obfuscated stored procedures (was Re: Oracle and Postgresql)  (Glyn Astill <glynastill@yahoo.co.uk>)
Re: Obfuscated stored procedures (was Re: Oracle and Postgresql)  (Casey Allen Shobe <cshobe@bepress.com>)
Список pgsql-general
On Wed, Sep 24, 2008 at 02:12:19PM +0000, Glyn Astill wrote:
> I'm not sure what the policy is on putting stuff in the docs, but
> how about putting that in the relevant place, as well as a note
> about the other option; using C and SPI.

C is not magic obfuscation gear.  Anybody with a debugger can expose
what it's doing.  There have been math papers showing that it's
impossible to hide the functionality of a piece of software based only
on the ability to run it, so the entire prospect of obscuring the
software's functionality when people can send arbitrary inputs to it
is one of those "known-impossible" problems like the halting problem.

Cheers,
David.
--
David Fetter <david@fetter.org> http://fetter.org/
Phone: +1 415 235 3778  AIM: dfetter666  Yahoo!: dfetter
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