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Re: [Stackevo] draft-thomson-use-it-or-lose-it

Martin Thomson <martin.thomson@gmail.com> Mon, 06 August 2018 10:56 UTC

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References: <991AD90C-A84A-4302-BB25-C5FAB33C8E80@trammell.ch> <3C07107C-D373-4E4B-ABBA-B025AC3A7B2A@tik.ee.ethz.ch> <CABkgnnXyNAHHTCx_pWtuNdQmFkSjt2b+ytGr7G636-_VtG6mTA@mail.gmail.com> <5BDD973D-BEA3-41A8-8555-975143177415@trammell.ch>
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From: Martin Thomson <martin.thomson@gmail.com>
Date: Mon, 06 Aug 2018 20:56:36 +1000
Message-ID: <CABkgnnWsosERt1erX-bQ-HzNh=hX+R+nB+dPJioc+Em7kfmgew@mail.gmail.com>
To: Brian Trammell <ietf@trammell.ch>
Cc: Mirja Kühlewind <mirja.kuehlewind@tik.ee.ethz.ch>, Stackevo <stackevo@iab.org>
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Subject: Re: [Stackevo] draft-thomson-use-it-or-lose-it
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On Mon, Aug 6, 2018 at 8:51 PM Brian Trammell <ietf@trammell.ch> wrote:
> IMO the challenge here is to make sure that the cost of the complexity added is much less than the amortized cost of the complexity of dealing with ossification after the fact. The encrypted state/codepoint space idea is reductio ad absurdum: iirc the POC for the encrypted instruction set (basically valgrind-as-VM) made it into one of the top three security conferences because it only induced a four-order-of-magnitude performance penalty.

:) TLS is easier than that, and almost cost free.  Flip any bit and
everything changes.  The only trick is to ensure that you have a human
making the changes at the other end, so the changes you make need to
be different every time in different ways.

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