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The concept of super peer has been introduced to improve the performance of popular P2P VoIP applications. A super peer is the strongest peer in the network that has the capacity to act as a server for a set of VoIP clients. There is no doubt that by taking benefit of heterogeneity, super peer can do improve the efficiency, without compromising the decentralised nature of P2P networks. The core issue...
Nowadays P2P VoIP system such as Skype has been widely used. A method to improve the QoS of P2P VoIP is to construct the application layer routing by selecting relay nodes in the P2P network. For this purpose, a distributed relay selection algorithm called MBRS which is based on Meridian is proposed. A new concept called latency routing table is put forward to replace the ring of Meridian and the...
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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