System for controlling access to broadcast transmissions

Details System for controlling access to broadcast transmissions System for controlling access to broadcast transmissions

1993-09-10

1996-01-02

Gregory, Bernarr E.

Cryptography

Key management

Having particular key generator

380 10, 380 21, 380 22, 380 23, 380 44, 235380, 235382, H04L 932, H04L 908, H04N 7167

Patent

active

054816092

ABSTRACT:
A system for controlling access to broadcast transmissions including a transmitter having a transmission encoder for scrambling the broadcast, a multiplicity of subscriber receivers, each having an identical receiving decoder, containing no secret cryptographic keys, for descrambling the broadcast and a plurality of selectable and portable executing apparatus each being operatively associatable with a receiving decoder at a partially different given time and each executing generally identical operations to generate a seed for use by the associated receiving decoder to enable the receiving decoder to descramble the broadcast.

REFERENCES:
patent: 2977434 (1961-03-01), Shanahan et al.
patent: 3890461 (1975-06-01), Vogelman et al.
patent: 4012583 (1977-03-01), Kramer
patent: 4494143 (1985-01-01), Lovick et al.
patent: 4748668 (1988-05-01), Shamir et al.
patent: 4811377 (1989-03-01), Krolopp et al.
patent: 4993066 (1991-02-01), Jenkins
patent: 5282249 (1994-01-01), Cohen et al.
Gale, B. et al. "Satellite and Cable TV . . . " Baylin Gayle Productions; Boulder Colorado, 1986.
Svigals, J. "The Smart Card . . . " Macmillan Publishing Co. N.Y., 1985.
Knuth, D. "The Art of Computer . . . " Seminumercial Algorithms, vol. 2, pp. 268-278 (with related materials).
"The Art of Computer Programming" vol. 31 Sorting and Searching pp. 506-549 Mass.

Affiliated with

Also associated with

Rating

System for controlling access to broadcast transmissions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System for controlling access to broadcast transmissions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for controlling access to broadcast transmissions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-242099