METHOD, SYSTEM AND EQUIPMENT FOR REALIZING MEDIA SECURITY OF IPTV MULTICAST SERVICE

摘要

A method, system and equipment for realizing the media security of IPTV multicast service are disclosed in the embodiments of the present invention. The method comprises the following steps that: a User Equipment (UE) acquires a Service Encryption Key (SEK) from a Key Management Function (KMF); the UE receives a multicasted Traffic Encryption Key (TEK) key stream encrypted by the SEK; the UE uses the SEK to decrypt the TEK, and uses the TEK to decrypt the multicasted media encrypted by the TEK. The present invention realizes the transmission security of LTV multicasted media of the IMS based IPTV architecture by distributing the keys SEK and TEK to UEs and media service function entities in the network of the IPTV service based on IMS network.