Cryptography – Key management – Having particular key generator
Patent
1989-01-09
1991-05-14
Tarcza, Thomas H.
Cryptography
Key management
Having particular key generator
34082544, 358335, 3581921, 3581941, H04N 7167
Patent
active
050162730
ABSTRACT:
The present invention is a dual communication mode sysem that combines a point to point communications device with a television receiver and a video tape recorder. The result is a highly versatile and easily operated personal entertainment and communication center. The point to point communication device included in the personal communication and entertainment center can provide information to: (a) reset the center's time clock automatically if power to the center is interrupted or if the center clock must be synchronized to an accurate time (b) program the personal entertainment and communication center from a remote location; (c) provide authorization signals to allow the personal entertainment and communication center to descramble coded signals received by the television receiver from a source such as a satellite or cable hookup; and (d) provide personal messages which can be recorded on the video tape recorder and displayed on the television screen.
REFERENCES:
patent: 4337480 (1982-06-01), Bourassin et al.
patent: 4418364 (1983-11-01), Wine
patent: 4525820 (1985-06-01), Enoki et al.
patent: 4746919 (1988-05-01), Reitmeier
patent: 4879611 (1989-11-01), Fukui et al.
AT&E Corporation
Cain David
Galbi Elmer W.
Tarcza Thomas H.
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