Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2007-11-13
2007-11-13
Peeso, Thomas H. (Department: 2132)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C713S193000, C713S169000
Reexamination Certificate
active
11112380
ABSTRACT:
A cipher key is generated by first information shared in secrete between a data transmitting unit10and a data receiving unit20, second information derived from duplication control information of transmit data and third information which is time change information shared between the data transmitting unit and the data receiving unit to cipher data by a CPU12by using the above-mentioned cipher key to transmit, from the data transmitting unit10to the data receiving unit20, transmit data in which the duplication control information and the time change information are added to the ciphered data.
REFERENCES:
patent: 0 875 813 (1998-11-01), None
patent: 1 165241 (1989-06-01), None
patent: 4 227951 (1992-08-01), None
patent: 10 4403 (1998-01-01), None
patent: 10 303945 (1998-11-01), None
patent: WO 99 22372 (1999-05-01), None
Ryuji Ishiguro, “Angou Gijutsu wo Tsukatta IEEE1394 jo no Computer Protection”, Proceedings of Sony Research Forum 1997, vol. 7, pp. 203-208.
Hitachi, Ltd. et al., “5C Digital Transmission Content Protection White Paper”, Revision 1.0 http://www.dtep.com/wp—spec.pdf, Jul. 14, 1998.
Teruyoshi Komuro, “Av wo Multi Media ka Suru IEEE1394 no Genjo Tenbo”, Denshi Gijutsu, Mar. 1, 1999, vol. 41, No. 3, pp. 2-7.
Digital Transmission Content Protection Specification vol. 1 (Information Version), Apr. 12, 1999.
Asano Tomoyuki
Ishiguro Ryuji
Komuro Teruyoshi
Osawa Yoshitomo
Frommer William S.
Frommer & Lawrence & Haug LLP
Peeso Thomas H.
Presson Thomas F.
Sony Corporation
LandOfFree
Data transmission system 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 transmission system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data transmission system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3879319