Cryptography – Particular algorithmic function encoding – Nbs/des algorithm
Patent
1983-04-27
1987-04-14
Buczinski, Stephen C.
Cryptography
Particular algorithmic function encoding
Nbs/des algorithm
380 21, 380 23, 380 28, H04N 7167, H04L 900
Patent
active
046582924
ABSTRACT:
An enciphering key distribution system comprises a transmitter having an address generator for generating the addresses of those subscribers to which a first enciphered TV signal is to be distributed. An enciphering generator generates a second enciphering, in response to the individual addresses, on a one-to-one correspondence with the individual subscribers. A multiplier produces a product which is associated with all the subscribers. An adder adds the first enciphered signal to the product. The system also comprises a receiver having a divider for dividing the signal transmitted from the transmitter by one of the second encipherings on a basis which is assigned to the particular subscriber or receiver.
REFERENCES:
patent: 4078152 (1978-03-01), Tuckerman
patent: 4323921 (1982-04-01), Guillou
patent: 4411017 (1983-10-01), Talbot
patent: 4484027 (1984-11-01), Lee et al.
patent: 4531020 (1985-07-01), Wechselberger et al.
Error-Correcting Codes, By: W. Wesley Peterson and E. J. Weldon, Jr., The MIT Press, pp. 170-179, Copyright 1972.
Nakamura Katsuhiro
Okamoto Eiji
Buczinski Stephen C.
Koltak Melissa L.
NEC Corporation
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