Digital Video Broadcasting (DVB); Specification for Service Information (SI) in DVB systems Final draft ETSI EN 300 468 V1.10.1 (2009-07) DVB必备资料 2009最新版
The Common Scrambling Algorithm (CSA) is used to encrypt streams of video data in the Digital Video Broadcasting (DVB) system. The algorithm cascades a stream and a block cipher, apparently for a larger security margin.