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Re: Coding securely, was Linux (in)security


From: Ben Laurie <ben () algroup co uk>
Date: Thu, 30 Oct 2003 20:54:10 +0000

Valdis.Kletnieks () vt edu wrote:
On Wed, 29 Oct 2003 12:08:20 GMT, Ben Laurie said:


Duh. That's a complete misunderstanding of the halting problem - which
is, in essence, that you can't write a program which can predict, in
general, whether another program will halt. Its perfectly possible to
write programs that are guaranteed to halt.


Correct.  The point is that 'can you design a language that *guarantees* non
terminating programs' is isomorphic to the compiler solving the Halting Problem.

Partial recursive functions (no, they aren't Turing complete).

Cheers,

Ben.

-- 
http://www.apache-ssl.org/ben.html       http://www.thebunker.net/

"There is no limit to what a man can do or how far he can go if he
doesn't mind who gets the credit." - Robert Woodruff


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