Authentication method for IPTV system and settop box therefor

摘要

PURPOSE: An authentication method at an IPTV system and set top box for the same are provided to reduce a packet delay time and a packet loss. CONSTITUTION: An IGMP(Internet Group Management Protocol) message is created(610). By using RC(Remode Controller)-5 algorithm, a pseudo-random number is generates as a weak authentication trailer(620). A set top box generates an HMAC value of 128 bit by using MD(Message-Digest)-5 alogrithm(630). The weak authentication trailer and a strong authentication trailer is inserted to the IGMP packet(640). The IGMP packet is transmitted(650).