[cap-talk] Delegating Responsibility in Digital Systems:Horton's "Who Done It?"

[Karp, Alan H]

> -----Original Message-----
> From: cap-talk-bounces at mail.eros-os.org 
> [mailto:cap-talk-bounces at mail.eros-os.org] On Behalf Of Pierre THIERRY
> Sent: Thursday, June 07, 2007 3:48 PM
> To: cap-talk at mail.eros-os.org
> Subject: Re: [cap-talk] Delegating Responsibility in Digital 
> Systems:Horton's "Who Done It?"
> 
> Scribit Karp, Alan H dies 07/06/2007 hora 15:47:
> > Each request from a different responsible party comes through a
> > different forwarder under Carol's control.  That provides Carol
> > undeniable authentication.  However, Carol can't prove that 
> to anyone
> > else because the forwarder is under her control.  For example, she
> > could have sent the request herself.
> 
> So if I understand this correctly, for the authentication to be
> undeniable to other subjects than Carol, the forwarder must 
> be under the
> control of a third party trusted by those subjects, and not under
> Carol's control, mustn't it?

Or signed by the sender.
> 
> Curiously,
> Pierre
> -- 
> nowhere.man at levallois.eu.org
> OpenPGP 0xD9D50D8A
> 

________________________
Alan Karp
Principal Scientist
Virus Safe Computing Initiative
Hewlett-Packard Laboratories
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