RE: A notion

polymorphic code usually follows one (or a combo) of three paths: 1) randomly insert NOPs into the code; 2) break codes into pieces (sort of like objects) and randomize placement and use JMP commands to keep the code in proper order; 3) develop a 'translation' mechanism and use tokens to represent code instructions...as code is executed, the translation code interprets and translates each token. not sure this is completely on-topic for SELINUX, but it does have application.

cheers-
phillip

> -----Original Message-----
> From: owner-selinux@tycho.nsa.gov [mailto:owner-selinux@tycho.nsa.gov]On
> Behalf Of Jose Nazario
> Sent: Monday, October 01, 2001 5:36 PM
> To: Justin R. Smith
> Cc: selinux@tycho.nsa.gov
> Subject: Re: A notion
>
>
> On 2 Oct 2001, Justin R. Smith wrote:
>
> > Isn't it possible to develop a "randomizing C compiler" that randomly
> > varies these distances every time it compiles a program? No two
> > compiles of the same source code would be exactly the same (but they
> > would execute the same way).
>
> to the best of my knowledge morphing code, in a variety of fashions (stuff
> that changes every time it compiles, every time it runs, while it runs) is
> a hot topic of DARPA research right now. as such, look around various
> sites doing research for DARPA and see who is doing what, publicly. a lot
> of the technology may be hidden behind various closed doors (ie commercial
> interests).
>
> ____________________________
> jose nazario jose@cwru.edu
> PGP: 89 B0 81 DA 5B FD 7E 00 99 C3 B2 CD 48 A0 07 80
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>
>
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