DETERMINING A SESSION ENCRYPTION KEY DURING A BROADCAST/MULTICAST SERVICE SESSION USING SECURE REAL-TIME TRANSPORT PROTOCOL

摘要

A method and apparatus for determining a session encryption key during a Broadcast/Multicast Service (BCMCS) using Secure Real-time Transport Protocol (SRTP). The method and apparatus includes receiving a sequence number during a session. Then computing a packet index using the sequence number and a roll-over-counter that has a predetermined value. A session key is then determined using a master key and the packet index.