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SRTP has been designed to provide confidentiality, message authentication and replay protection to the RTP traffic. It is very useful for protecting against voice and video stream eavesdropping. However, a good key management protocol is needed to support SRTP. SDES, ZRTP, and DTLS-SRTP have been proposed as keying protocols. Yet, from the literature, all of them have some drawbacks. So, in this paper, we propose a technique to enhance the SDES protocol to be more secure.doi:10.7763/ijcte.2012.v4.576 fatcat:ee2an64pjndn3j576xvp77e2km