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. It's a satellite signal scrambling system developed by the European Broadcasting Union and a consortium of hardware manufacturers. Basic Interoperable Scrambling System, usually known as BISS, is a scrambling method used in digital television systems.
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