BISS-1 transmissions are protected by a 12 digit hexadecimal “session key” that is agreed by the transmitting and receiving parties prior to transmission.There are mainly two different types of BISS encryption used: BISS was an attempt to create an “open platform” encryption system, which could be used across a range of manufacturers equipment.
Proprietary encryption methods were determined by encoder manufacturers, and placed major compatibility limitations on the type of satellite receiver (IRD) that could be used for each feed. Unencrypted satellite feeds allowed anyone with the correct equipment to view the program material. RAS, or PowerVu), or without any encryption. Prior to its development, “ ad hoc” or “occasional use” satellite news feeds were transmitted either using proprietary encryption methods (e.g.
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