Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1993-11-26
1996-04-16
Buczinski, Stephen C.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 16, 380 23, H04N 7167, H04K 100
Patent
active
055090737
ABSTRACT:
A communications network between a central station which broadcasts coded information and at least one receiver suitable for receiving and decoding these broadcasts, in which, in order to control the number of users, permission for users to access the network is determined by a limited number of special receivers respectively assigned to such users and also by the need to authenticate each user before granting access to the program by his receiver. In order to facilitate identification of the user and authentication of his access rights to a particular program, the receiver allows remote authentication, and also local authentication with a memory card in which information related to certain access rights is stored.
REFERENCES:
patent: 4751732 (1988-06-01), Kamitake
patent: 4905280 (1990-02-01), Wiedemer et al.
patent: 5144663 (1992-09-01), Kudelski et al.
Funkschau--vol. 61, No. 5, Feb. 24, 1989, Germany, pp. 59-62 XP000011447; C. Schepers "Eurocript--Der Schlussel Zum Scrambling-Problem?".
Elektronik--vol. 38, No. 6, Mar. 17, 1989, Germany pp. 56-58 XP000039410; M. Junke "Digitales Fernsehkonzept Fur Satelliten-Pay-TV".
Cable Tech & Services--Jan. 30, 1993 (pp. 5 & 12); "Smartcrypt sur le terrain de Visiopass et Syster".
Satellite Trader--Mar. 1993: "Prospect of pirate-proof PPV".
La Lettre de la Videocommunication par Cable No. 68; Apr. 5, 1993, pp. 1, 8, 9, 10.
Cable & Satellite Express, vol. 10, No. 12, Jun. 10, 1993: J. Alliot, "RCF chooses Smartcrypt".
Cable & Satellite Europe, Aug. 1993: "Innovations-Very Smart Card".
Card Technology Today, vol. 4, No. 7, Mar. 1993.
Advanced Television Markets, Issue 13, Feb. 1993: G. Morgan, "Smartcrypt steps up".
Cable Tech & Services, May 21, 1993; "Chaines Cinema: decryptage, un an apres".
INF Cable, No. 394, May 21, 1993, "Sous le Projecteur", pp. 1 & 4.
IEEE Transactions on Consumer Electronics-vol. 37, No. 3, Aug. 1991, New York, pp. 432-436 XP0000263219; V. Lenoir "Euroscript, A Successful Conditional Access System".
Buczinski Stephen C.
Schlumberger Industries
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