Cryptography – Key management – Having particular key generator
Patent
1996-08-29
1999-07-27
Cain, David
Cryptography
Key management
Having particular key generator
H04K 100
Patent
active
059303670
ABSTRACT:
An apparatus for processing digital data signals which may be used in recording/reproducing and transmitting/receiving of such signals. During recording or transmission, error correction codes are added to the digital signals and a portion of such error correction codes is replaced with other information. Such other information may provide an indication as whether the digital signals are original signals or a copy thereof. During reproduction or reception, the other information is extracted and utilized in a predetermined manner. For example, reproduced digital signals may or may not be outputted depending on whether the extracted information indicates that the digital signals are original signals or a copy thereof. As a result, unauthorized copying of signals may be discouraged or prevented. Furthermore, by replacing a portion of the error correction code with the other information, storage capacity for the digital signals and/or the rate for processing such signals may not be adversely effected.
REFERENCES:
patent: 4788685 (1988-11-01), Sako et al.
patent: 5185792 (1993-02-01), Shimada
patent: 5506902 (1996-04-01), Kubota
patent: 5596639 (1997-01-01), Kikinis
patent: 5668879 (1997-09-01), Ibaraki et al.
patent: 5699434 (1997-12-01), Hogan
Kawashima Isao
Kurihara Akira
Masuda Shozo
Osawa Yoshitomo
Sako Yoichiro
Cain David
Frommer William S.
Smid Dennis M.
Sony Corporation
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