Basic Interoperable Scrambling System

Basic Interoperable Scrambling System, more commonly as BISS, is an encryption system for satellite TV, which was developed by the European Broadcasting Union and a consortium of hardware manufacturers.

The transfer of a BISS encrypted channel by means of a twelve hexadecimal digits wide session key that is negotiated between the TV station and the receiver in advance. BISS is used among other things for the feed by earthTV, which is used among others by the German news channel N24. Many other feeds, especially for pay-TV, use BISS. TRT is used temporarily to 42 ° East, for example, for Bundesliga broadcasts while using at 7 degrees East Irdeto2. The BBC uses BISS on Intelsat 907 at 27.5 ° West for the DVB-T playback.