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Exchanging cryptographic keys to encrypt the media stream in the Session Initiation Protocol ({SIP}) has proven difficult. The challenge is to effectively exchange keys while preserving the features of the protocol (e.g., forking, re-targeting, request recursion, etc.), minimizing key exposure to unintended parties, eliminating voice clipping, maintaining end-to-end key privacy, interfacing with PSTN,...
According to P2P VoIP signaling protocol security and its distributed features, an authenticated key agreement scheme is proposed by using identity-based cryptography, security, efficiency and key escrow problems are analyzed. According to P2P VoIP media stream security, a secure media stream scheme is proposed and the application problems are discussed. Authentication and privacy are provided for...
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