| 摘要 |
A distribution method, transmitting and receiving apparatus and system for security policy of multicast sessions are provided. The transmitting method for security policy of multicast sessions includes: after a DTLS session is set up between a sender and a receiver of a SRTP multicast session, security policy request data sent from the receiver is received by the sender; security policy response data is constructed according to the security policy and multiplexed with SRTP data of the SRTP multicast session, and then sent to the receiver. Security policy is negotiated in band, so it is resolved that the key negotiation method in the prior art can not satisfy safe negotiation for security policy of SRTP multicast sessions. |
