Re: [Sip] comments on draft-kupwade-sip-iba-00

[Eric Rescorla <[e-mail]>]

At Fri, 29 Feb 2008 12:14:50 -0600,
Dean Willis wrote:
> On Feb 29, 2008, at 12:32 AM, Eric Rescorla wrote:
> > Yes, this is a clear advantage of IBE over PKI-based systems. But
> > as I said, it doesn't apply to IBS. Moreover, if there's any
> > kind of retargeting, then IBE has real problems.
> >
> 
> I see it as applying directly to IBS. Every message carries enough  
> information (without the overhead of carrying a cert) for any  
> recipient in the hierarchy to be able to validate a signature on that  
> message. That's very useful in a P2P sort of world.

We're going around in circles. The only overhead here of carrying
the cert is the certificate data itself. In other words, this is a
fancy form of certificate compression, just as I said at the 
beginning.

I've deleted the rest of your message since it primarily goes over
the same ground.

-Ekr
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