A public key-based encryptiondecryption technique for real-time signals

Abstract

Pay-TV Satellite Broadcast Service is very common today. However, protecting signals from being pirated is a principal issue. That is done using a conditional access system. In this thesis, we introduce and analyze different existing conditional access system design methods. Modification of the current method is proposed, and significant performance improvement is obtained. Satellite communication and cryptology are studied theoretically, which enables us to design public key-based encryption/decryption techniques for satellite broadcast that can supply higher secret solutions. Our simulation results show that the new design system is superior and more practical.