[FoRK] Re: identity-based encryption

Lucas Gonze lgonze at panix.com
Mon Feb 9 10:18:33 PST 2004

Can you explain Joux's "one round tripartite Diffie-Hellman" algo to a 
crypto numbnuts like myself, Rob?  Is this even possible?

On Monday, Feb 9, 2004, at 12:54 America/New_York, Dr. Robert J. Harley 
> The best example, IMO, is Antoine Joux's "one round tripartite
> Diffie-Hellman" (ANTS 4): beautiful.  Another is IBE.  IMO, the main
> advantage of IBE is facilitating a network effect: you can send
> encrypted mail to somebody and they will be motivated to
> download/install/configure software to decrypt; whereas normally you
> have to ask them to download/install/configure before you can send
> them encrypted mail so it just doesn't happen.  The main disadvantage
> is that it requires a trusted party to operate public/private key
> generation.  Once you allow that, lots of things become easy anyway.
> Also I (and many others) just don't trust third parties. And you need
> to authenticate yourself to them which is a whole 'nother source of
> complexity.  So the elegance is built on ugliness and isn't nearly so
> elegant after all.

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