METHOD AND APPARATUS FOR MUTUAL AUTHENTICATION IN DOWNLOADABLE CONDITIONAL ACCESS SYSTEM

摘要

PURPOSE: A method and an apparatus for mutual authentication in a downloadable conditional access system are provided to defend each kind of attach resulting from a security threat when downloading a CAS software by securing the safety in key generation, message authentication and so on. CONSTITUTION: A DCAS(Downloadable Conditional Access System) comprises an authentication unit(110), a key management unit(130) and a download unit(140). The authentication unit transmits an authentication session key to a security module(200) through a CMTS(Cable Modem Termination System)(120). The key management unit generates and manages an authentication session key, and the download unit downloads and updates a CAS(Conditional Access System) software through the control of the security module.