Method for publishing certification information...

Details Method for publishing certification information... Method for publishing certification information...

H - Electricity

04

L

H04L 9/28 (2006.01) G07B 17/00 (2006.01) H04L 9/32 (2006.01)

Patent

CA 2303450

A method for certification by a plurality of certifying authorities of the public key of a user wishing to communicate using a public key encryption system while asserting only a subset of rights. A plurality of certifying stations and a user station exchange information and the user station derives a plurality of private keys from the exchanged information. The certifying stations also publish related information and their public keys. The user communicates using a private key formed by summing selected ones of said plurality of private keys corresponding to asserted rights. A third party can derive the public key corresponding to the user's summed private key by operating on the published information with a summation of the certifying station public keys.

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