Basic Interoperable Scrambling System

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Basic Interoperable Scrambling System, usually known as BISS, is a satellite signal scrambling system developed by the European Broadcasting Union and a consortium of hardware manufacturers.

Prior to its development, "ad-hoc" or "Occasional Use" satellite news feeds were transmitted without any encryption. This allowed anyone with the correct equipment to view the program material. Using BISS the transmission is protected by a 12 digit "session key" that is agreed by the transmitting and receiving parties prior to transmission. The key is entered into both the encoder and decoder , this key then forms part of the encryption of the digital TV signal and only receivers with the correct key will decrypt the signal. The system, however, is insecure.

External links

[BISS-E Technical Specification by EBU]

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