Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Central trusted authority provides computer authentication
Reexamination Certificate
2008-06-10
2008-06-10
Vu, Kim (Department: 2135)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Central trusted authority provides computer authentication
C713S155000, C713S168000, C713S175000, C380S277000
Reexamination Certificate
active
07386722
ABSTRACT:
A certificate management method is provided whereby a plurality of service providers have different reliable certificate authorities and, when certificates issued from the certificate authorities are implemented into a smart card, merely by revoking the certificate issued from the certificate authority on which the first service provider relies, all other implemented certificates can be revoked, and the certificates can be individually revoked. A system for implementing the method is provided. The certificate authorities n (n≧2) issue a certificate n by using a private key n′ corresponding to certificate n′ generated by using a certificate1issued from a certificate authority1which has previously been installed in the smart card and a corresponding private key1. Thus, the issued certificates have a hierarchical chain relation. When the user wants to revoke all certificates, the certificate1issued from the certificate authority1is revoked.
REFERENCES:
patent: 6438550 (2002-08-01), Doyle et al.
patent: 2002/0026578 (2002-02-01), Hamann et al.
patent: 2003/0056099 (2003-03-01), Asanoma et al.
patent: 2003/0163687 (2003-08-01), Dare et al.
patent: 2002-298088 (2002-10-01), None
“Global Platform Card Specification Version 2.1” p. 27, Global Platform Inc. of U.S.A., Jun. 2001.
Kodama Toshiomi
Susaki Seiichi
Uchiyama Hiroki
Umezawa Katsuyuki
Hitachi , Ltd.
McDermott Will & Emery LLP
Paliwal Yogeshi
Vu Kim
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