Information processing device, information processing...

Details Information processing device, information processing... Information processing device, information processing...

2007-05-29

2007-05-29

Barrón, Jr., Gilberto (Department: 2134)

Cryptography

Key management

Key distribution

C380S277000

Reexamination Certificate

active

10169653

ABSTRACT:
In an information processing system and method which enables detection processing of a revoked entity using an enabling key block (EKB), a device or a service provider as a revoked entity is determined on the basis of the enabling key block (EKB) used for key distribution in a tree structure. ID which enables position identification in the hierarchical key distribution tree is stored in a public key certificate and tracing processing using a tag of the enabling key block (EKB) is executed on the basis of the ID acquired from the public key certificate, thus determining whether or not the ID is of a position where EKB processing (decryption) is possible and determining the presence/absence of revocation of an entity corresponding to the ID.

REFERENCES:
patent: 5903651 (1999-05-01), Kocher
patent: 5949877 (1999-09-01), Traw et al.
patent: 6049878 (2000-04-01), Caronni et al.
patent: 6397329 (2002-05-01), Aiello et al.
patent: 0 930 556 (1999-01-01), None
patent: 11-187013 (1999-07-01), None
patent: 11-205305 (1999-07-01), None
Menezes, A. et al., “Handbook of Applied Cryptography”, 1997, p. 3, pp. 551-560.
“5C Digital Transmission Content Protection White Paper”, Revision 1.0, (1998), pp. 1-13 (http://www.dtcp.com).
Wong, C. K. et al., “Secure Group Communications Using Key Graphs”, In: Proceedings of ACM SIGCOMM'98, (1998), pp. 68 to 79, (http://www.acm.org/sigcomm/sigcomm98/tp/technical.html).
Waldvogel, M. et al., “The VersaKey Framework: Versatile Group Key Management”, IEEE Journal on Selected Areas in Communications, Sep. 1999, vol. 17, No. 9, pp. 1614 to 1631.

Affiliated with

Also associated with

Rating

Information processing device, information processing... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Information processing device, information processing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Information processing device, information processing... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3767880