Cryptography – Key management
Reexamination Certificate
2006-08-15
2006-08-15
Louis-Jacques, Jacques H. (Department: 2134)
Cryptography
Key management
C380S273000
Reexamination Certificate
active
07092527
ABSTRACT:
A method, system and program product for managing a size of a key management block (KMB) during content distribution is provided. Specifically, a first KMB corresponding to a first subtree of devices is received along with content as encrypted with a title key. If a size of the first KMB exceeds a predetermined threshold, a second subtree will be created. A second KMB corresponding to the second subtree of devices will then be generated. The second KMB contains an entry revoking the entire first subtree of devices and, as such, is smaller than the first KMD. Any compliant devices from the first subtree are migrated to the second subtree.
REFERENCES:
patent: 4736422 (1988-04-01), Mason
patent: 5093860 (1992-03-01), Steinbrenner et al.
patent: 5173938 (1992-12-01), Steinbrenner et al.
patent: 5375169 (1994-12-01), Seheidt et al.
patent: 5410602 (1995-04-01), Finkelstein et al.
patent: 5592552 (1997-01-01), Fiat
patent: 5712800 (1998-01-01), Aucsmith
patent: 5787173 (1998-07-01), Seheidt et al.
patent: 5812666 (1998-09-01), Baker et al.
patent: 5894516 (1999-04-01), Brandenburg
patent: 6047072 (2000-04-01), Field et al.
patent: 6097816 (2000-08-01), Momiki et al.
patent: 6118873 (2000-09-01), Lotspiech et al.
patent: 6240188 (2001-05-01), Dondeti et al.
patent: 6330671 (2001-12-01), Aziz
patent: 2001/0021255 (2001-09-01), Ishibashi
patent: 2002/0085715 (2002-07-01), Ripley
patent: 2002/0087871 (2002-07-01), Ripley
patent: 2002/0104001 (2002-08-01), Lotspiech et al.
patent: 0197392 (1987-03-01), None
patent: 10-070530 (1998-03-01), None
patent: 11-167538 (1999-06-01), None
patent: 11215115 (1999-08-01), None
patent: 2001186119 (2001-07-01), None
patent: 2002-077131 (2002-03-01), None
patent: 2002-108811 (2002-04-01), None
patent: 2003-204321 (2003-07-01), None
patent: 2003-273862 (2003-09-01), None
RPS920010134, “Transmitting a Broadcast Via the Internet Within A Limited Distribution Base of Listeners”, Inventor: Dave Challener, Dated: Dec. 2001, 1 page.
IBM Technical Disclosure Bulletin “Data Encryption Algorithm Key Distribution Via Public Key Algorithm”, vol. 28, No. 3, Dated: Aug. 1985, pp. 1065-1069.
6743379, INSPEC Abstract No.: C2000-12-6130S-022, “Secure Digital Content Control and Distribution Through the Internet”, Authors: Changsheng Xu and Jiankang Wu, 2 pages, Dated: 2000.
Foster Eric M.
Lotspiech Jeffrey B.
Pestoni Florian
Plouffe, Jr. Wilfred E.
Schaffa Frank A.
Hoffman Warnick & D'Alessandro LLC
Lipman Jacob
Louis-Jacques Jacques H.
Steinberg William H.
LandOfFree
Method, system and program product for managing a size of a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method, system and program product for managing a size of a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method, system and program product for managing a size of a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3690817