SRTP protocol extension

摘要

For enhancing a Secure Real-time Transport Protocol (SRTP) session between a communication device (CD) and an application server (AS), the application server (AS):negotiates at least two different cryptographic contexts with the communication device (CD),stores a cryptographic context identifier (IdC) in correspondence with a set of cryptographic parameters for each negotiated cryptographic context,activates a set of cryptographic parameters and producing a SRTP packet with a RTP payload encrypted by means of the activated set of cryptographic parameter.