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Eurocrypt'97 rump session talk
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At Eurocrypt'97, I gave a short talk on the death of X.500-style PKIs
(because the namespace is too large, defeating security) and went from there
to SDSI, as a solution to the namespace problem.
I then mentioned that both X.500/X.509 and SDSI 1.0 shared the same other
problem -- that they tried to map relationships from 3d space (where people
speak) into cyberspace (where keys speak), but ignored the other side-effect
of the net: that relationships are forming in cyberspace and need to be
mapped entirely within cyberspace (ala SPKI).
I noted that we still need to map from 3D space to cyberspace, ala SDSI,
occasionally (e.g., for e-mail) -- but now we also need to map from
cyberspace to 3D space sometimes.
For that purpose, I postulated two forms of certificate, which I labeled
donation vs. subpoena certificates.
If you want to donate $1,000,000 to me, the (keyholder <k1>), and you want
to mail a physical check, then you need my mailing address. The certificate
that you can trust the most for that purpose is one signed by me, <k1>.
If you want to serve me with legal papers, e.g., a subpoena, then the
certificate giving my physical address which you can trust the most is
probably going to be signed by K_p (a process serving company).
- Carl
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|Carl M. Ellison cme@cybercash.com http://www.clark.net/pub/cme |
|CyberCash, Inc. http://www.cybercash.com/ |
|207 Grindall Street PGP 2.6.2: 61E2DE7FCB9D7984E9C8048BA63221A2 |
|Baltimore MD 21230-4103 T:(410) 727-4288 F:(410)727-4293 |
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