Cryptography – Key management – Having particular key generator
Patent
1995-10-19
1998-02-24
Cangialosi, Salvatore
Cryptography
Key management
Having particular key generator
380 20, 380 45, H04L 900
Patent
active
057217785
ABSTRACT:
A digital signal transmitting method, a digital signal receiving apparatus, and a recording medium which ensure the security of fee-charged software information. When an image providing predetermined services is transmitted, a band-compression coded digital video signal is given first-encryption processing and then the digital signal is further given encryption processing and transmitted. Therefore, double security can be added to the video signal and a digital signal transmitting method where its security is more firmly ensured can be realized.
REFERENCES:
patent: 5341425 (1994-08-01), Wasilewski et al.
patent: 5420866 (1995-05-01), Wasilewski
patent: 5544161 (1996-08-01), Bigham et al.
patent: 5590202 (1996-12-01), Bestler et al.
Proceedings from Eleven Technical Sessions of the Annual Convention and Exposition of the National Cable Television Association, San Francisco, Jun. 6-9, 1993, No. Convention 42, 6 Jun. 1993, Rutkowski, K., pp. 123-127, XP 000410491, Stubbs, G.S., "Conditional Access for Compression Systems: Desirable Attributes and Selection Criteria".
Goto Koichi
Kubota Yukio
Cangialosi Salvatore
Frommer William S.
Sinderbrand Alvin
Sony Corporation
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