| http://www.w3.org/ns/prov#value | - A method and apparatus as in claim 5 with an additional step wherein the registration authority, after verifying the validity of said proof and concluding that said proof holds, publishes together with said user ID, said public key in at least one of a public key database, a record given to said user including a signature on said user's said public key using said registration authority's private k
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