Information recording/reproducing apparatus and method

Details Information recording/reproducing apparatus and method Information recording/reproducing apparatus and method

2006-08-15

2006-08-15

Peeso, Thomas R. (Department: 2132)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S189000, C713S193000, C713S152000, C713S152000

Reexamination Certificate

active

07093128

ABSTRACT:
When a player cannot play back data because a master key held by the player has a generation older than the generation of a master key having been used for recording the data, or when a recorder cannot record data because a master key held by the recorder has a generation older than the generation of a master key necessary for recording to a recording medium, the user is prompted to renew the master key for acquisition of the necessary master key, thereby enabling the data playback or data recording. The renewed master key is distributed in such a form that can be processed by a specific device via a transmission medium such as a recording medium, network, IC card, telephone line, for example, via a tree-structured distribution system.

REFERENCES:
patent: 10-3256 (1998-01-01), None
patent: 10-293726 (1998-11-01), None
patent: 11-39795 (1999-02-01), None
patent: 11-126425 (1999-05-01), None
patent: 11-187013 (1999-07-01), None
patent: 11-250570 (1999-09-01), None
patent: 11-250571 (1999-09-01), None
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, especially pp. 1616 to 1621.
Wong, C. K. et al., Secure Group Communications Using Key Graphs. In: Proceedings of ACM SIGCOMM'98, (1998), pp. 68 to 79 especially, 3.4 Leaving a tree key graph (http://www.acm.org/sigcomm/sigcomm98/tp/technical.html).
5C Digital Transmission Content Protection White paper Revision 1.0, (1998), pp. 3, 11, 12, (http://www.dtcp.com).
Makoto Tatebayashi, et al., “Kiroku Media no Contents Hogo System”, 2000 nen Denshi Joho Tsushin Gakkai Kiso Kyoukai Society Taikai Koen Ronbunshuu, Sep. 07, 2000, pp. 367 to 368.
Patent Abstracts of Japan, abstract of JP 11-224461, (Sony Corporation), Aug. 17, 1999.

Affiliated with

Also associated with

Rating

Information recording/reproducing apparatus and method 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 recording/reproducing apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Information recording/reproducing apparatus and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3691860