发明名称 |
Method for publishing certification information representative of selectable subsets of rights and apparatus and portable data storage media used to practice said method |
摘要 |
<p>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. <IMAGE></p> |
申请公布号 |
EP1043696(A2) |
申请公布日期 |
2000.10.11 |
申请号 |
EP20000106075 |
申请日期 |
2000.03.30 |
申请人 |
PITNEY BOWES INC. |
发明人 |
CORDERY, ROBERT A. |
分类号 |
H04L9/08;G07B17/00;H04L9/30;H04L9/32;(IPC1-7):H04L9/30;G07B17/04 |
主分类号 |
H04L9/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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