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Re: non-repudiation vs. revocation
Carl Ellison wrote:
> To be sure of that, you need the card itself to display to you what
> it's signing -- not just a hash.
> The problem is so difficult that we're forced to fall back on trusting
> our H/W and OS as if it were a TCB -- which it isn't. Therefore,
> non-repudiation is really out of the question.
I do understand that total non-repudiation is out of the question.
However, I fail to see why it would not work in some circumstances, say
when you are signing a SPKI cert. Provided that we identify some standard
SPKI auths, I think it would be fairly simple to devise a smartcard that
can parse such auths and present them to the user for signing.
Just a thought. But I like it. :-) Then again, I've been known to be
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