Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2002-03-27
2008-09-16
LaForgia, Christian (Department: 2139)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C726S027000, C380S278000
Reexamination Certificate
active
07426639
ABSTRACT:
This invention relates to an information processing apparatus for permitting so-called grouping without recourse to group keys. A content server retains in advance certificates of devices subject to grouping. Each certificate contains a public key of the corresponding device. When providing a content, the content server authenticates the certificates of the grouped devices for which the content is destined (step S281), encrypts a content key by use of public keys of the authenticated certificates (step S283), and transmits the content key thus encrypted to each of the devices making up the group (step S284) together with the content. The inventive apparatus is applied to devices that provide contents.
REFERENCES:
patent: 5220604 (1993-06-01), Gasser et al.
patent: 5949877 (1999-09-01), Traw et al.
patent: 6058383 (2000-05-01), Narasimhalu et al.
patent: 6263434 (2001-07-01), Hanna et al.
patent: 6535929 (2003-03-01), Provino et al.
patent: 6748530 (2004-06-01), Aoki
patent: 6792113 (2004-09-01), Ansell et al.
patent: 6873975 (2005-03-01), Hatakeyama et al.
patent: 6883100 (2005-04-01), Elley et al.
patent: 6886098 (2005-04-01), Benaloh
patent: 6912512 (2005-06-01), Miyazaki et al.
patent: 7185194 (2007-02-01), Morikawa et al.
patent: 2001/0051996 (2001-12-01), Cooper et al.
patent: 2002/0077988 (2002-06-01), Sasaki et al.
patent: 2002/0138593 (2002-09-01), Novak et al.
patent: 2002/0144149 (2002-10-01), Hanna et al.
patent: 2002/0194209 (2002-12-01), Bolosky et al.
patent: 1 083 699 (2001-03-01), None
patent: 10-215245 (1998-08-01), None
patent: 11-219320 (1999-08-01), None
patent: 11-346210 (1999-12-01), None
R. Housley et al. RFC 2459: Internet X.509 Public Key Infrastructure Certificate and CRL Profile. Jan. 1999. The Internet Society. p. 1-121.
Marcel Waldvogel, et al., “The VersaKey Framework: Versatile Group Key Management” Sep. 1999, IEEE Journal On Selected Areas In Communications, IEEE Service Center, Piscataway, US, XP011055017, ISSN: 0733-8716.
LaForgia Christian
Lerner David Littenberg Krumholz & Mentlik LLP
Sony Corporation
LandOfFree
Information processing apparatus and method for managing... 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 apparatus and method for managing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Information processing apparatus and method for managing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3986685