Cryptography – Particular algorithmic function encoding – Public key
Patent
1994-05-02
1996-04-16
Gregory, Bernarr E.
Cryptography
Particular algorithmic function encoding
Public key
380 9, 380 10, 380 20, 380 21, 380 49, H04L 930, H04N 7167
Patent
active
055090770
ABSTRACT:
For data security in a pay-TV system, a public key is respectively calculated from a secret key prescribed for pay-TV receiver by A program purveyor. This public key is utilized in the program distribution center for encoding secondary key information for matching the pay-TV receiver to transmission modalities that are repeatedly modified and that are provided for the pay-TV receiver in the program distribution center. The program purveyor can prescribe new keys from time to time. The initial settings of scramblers and descramblers can be modified as transmission modalities.
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Gregory Bernarr E.
Siemens Aktiengesellschaft
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