MOBILE CONDITIONAL ACCESS SYSTEM BASED ON SOFTWARE FOR BANDWIDTH ENHANCEMENT

摘要

PURPOSE: A mobile conditional access system based on software for increasing bandwidth is provided to support a safe CAS service based on software in a unidirectional mobile terminal. CONSTITUTION: A CAS(Conditional Access System) server(100) transmits an EMM(Entitlement Management Message) and an ECM(Entitlement Control Message) including a key related to authentication. The CAS server includes an encoded CW(Control Word) and the EMM in the ECM and transmits it. A CAS client(200) decodes an encoded public key of the CAS server extracted from the EMM and the encoded CW extracted from the ECM.