Method for data security in a digital telecommunication system

Details Method for data security in a digital telecommunication system Method for data security in a digital telecommunication system

H - Electricity

04

L

H04L 9/08 (2006.01) H04N 7/167 (2006.01)

Patent

CA 2126963

ABSTRACT OF THE DISCLOSURE 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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