From: arnold@skeeve.com
To: tuhs@minnie.tuhs.org, douglas.mcilroy@dartmouth.edu
Subject: Re: [TUHS] Thompson trojan put into practice
Date: Mon, 20 Sep 2021 01:12:27 -0600 [thread overview]
Message-ID: <202109200712.18K7CRBo000544@freefriends.org> (raw)
In-Reply-To: <CAKH6PiUzQW9BhXrEExw_QaDTjuQ-gPZOZOpzKYLHu1DzLspL2Q@mail.gmail.com>
Douglas McIlroy <douglas.mcilroy@dartmouth.edu> wrote:
> > It's part of my academic project to work on provable compiler security.
> > I tried to do it according to the "Reflections on Trusting Trust" by Ken
> > Thompson, not only to show a compiler Trojan horse but also to prove that
> > we can discover it.
>
> Of course it can be discovered if you look for it. What was impressive about
> the folks who got Thompson's compiler at PWB is that they found the horse
> even though they weren't looking for it.
I had not heard this story. Can you elaborate, please? My impression from having
read the paper (a long time ago now) is that Ken did the experiment locally only.
Thanks,
Arnold
next prev parent reply other threads:[~2021-09-20 7:13 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-20 2:39 Douglas McIlroy
2021-09-20 2:50 ` Larry McVoy
2021-09-20 7:12 ` arnold [this message]
-- strict thread matches above, loose matches on Subject: below --
2021-09-20 11:57 Douglas McIlroy
2021-09-20 13:51 ` Ken Thompson
2021-09-20 14:35 ` John P. Linderman
2021-09-20 3:04 Noel Chiappa
2021-09-20 3:21 ` David Arnold
2021-09-20 4:35 ` Earl Baugh
2021-09-20 4:36 ` Earl Baugh
2021-09-19 15:46 arnold
2021-09-19 15:58 ` Al Kossow
2021-09-19 16:02 ` arnold
2021-09-19 16:10 ` John Floren
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