Data recording apparatus, data recording method, and data...

Information security – Prevention of unauthorized use of data including prevention... – Limitations on number or amount of copies

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C726S026000, C726S030000

Reexamination Certificate

active

10123557

ABSTRACT:
The present invention is intended to significantly reduce the content data processing and transfer times by skipping root key checking processing, when transmitting a plurality of pieces of encrypted content data stored in a primary recording medium to a secondary recording medium along with key information of these plural pieces of content data, if the key information for a piece of content data to be transmitted from the primary recording medium is the same as the key information for an already transmitted piece of content data.

REFERENCES:
patent: 5048085 (1991-09-01), Abraham et al.
patent: 5530235 (1996-06-01), Stefik et al.
patent: 5982675 (1999-11-01), Fujimoto
patent: 6226618 (2001-05-01), Downs et al.
patent: 6772340 (2004-08-01), Peinado et al.
patent: 1 008 989 (2000-06-01), None
Communication and Search Report from the European Patent Office, dated Oct. 12, 2006 for Application No. 02252593.5-1247.
R. Canetti et al., “Multicast Security: A Taxonomy and Some Efficient Constructions,” INFOCOM 1999, 18thAnnual Joint Conference of the IEEE Computer and Communications Societies Proceedings, Mar. 21-25, 1999, pp. 708-716, vol. 2, New York, NY.
M. Waldvogel et al., “The VersaKey Framework: Versatile Group Key Management,” IEEE Journal On Selected Areas in Communications, IEEE Service Center, Sep. 1999, pp. 1614-1631, vol. 17, No. 9, Piscataway, NJ.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Data recording apparatus, data recording method, and data... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data recording apparatus, data recording method, and data..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data recording apparatus, data recording method, and data... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3827367

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.