Multimedia network system

Details Multimedia network system Multimedia network system

1991-01-15

1992-10-27

Gregory, Bernarr E.

Cryptography

Particular algorithmic function encoding

Public key

380 4, 380 5, 380 9, 380 10, 380 21, 380 43, 380 49, H04L 930, H04N 7167

Patent

active

051596334

ABSTRACT:
There is disclosed a multimedia network system for transmitting real-time communication type information such as a television video signal and storage type information such as a computer file using at least one transmission path. The real-time communication type information is encrypted by a secret-key system, and the storage type information is encrypted by a public-key system. A common encryption key of the public-key system is changed in each communication. High-speed information can be safely encrypted and transmitted.

REFERENCES:
patent: 4245245 (1981-01-01), Matsumoto et al.
patent: 4464678 (1984-08-01), Schiff et al.
patent: 4623920 (1986-11-01), Dufresne et al.
BBC Research Department Report, Aug. 1988, Tadworth, Surrey, UK, pp. 1-18, D. T. Wright, "Conditional Access Broadcasting: Datacare 2, An Over-Air Enabled System For General Purpose Data Channels".

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