Abstract
An advanced form of broadcast satellite digital broadcasting that presents high-quality video services in the 4K and 8K video formats is under consideration. A conditional access system (CAS) will essential for this broadcasting and the creation of a new business model. CAS provides mechanisms to protect content rights and restrict broadcasting reception to only subscribers, by using content scrambling based on cryptography. We assume that attacks by pirates will increase because advanced BS digital broadcasting will have high-quality video content. Therefore, CAS needs high-security functions. In this paper, we clarify the requirements on CAS for advanced BS digital broadcasting and describe a downloadable CAS that meets the requirements. We also conduct an evaluation on an FPGA-based evaluation system with downloadable CAS functions that work on actual services.
