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Today, most P2P applications do not consider locality on the underlying network topology when choosing their neighbors on the P2P routing layer. As a result, participating peers may experience long delays and peers' ISPs suffer from a large amount of (costly) inter-ISP traffic. One potential solution to mitigate these problems is to have ISPs or third(More)
Recent research activities have proposed using a peer-to-peer network for user registration and user location in session initiation protocol (SIP)-based voice-over-IP (VoIP) networks. The main motivation for peer-to-peer (P2P) SIP is higher robustness as well as easy configuration and maintenance (compared to client-server SIP). However, these advantages(More)
In this paper, we show how to enable Information- Centric Networking (ICN) on existing IP networks, such as ISP or data center networks, using Software-Defined Networking (SDN) functions and control. We describe a mechanism that (i) enables addressing and transfer through non-SDN controlled networks (i. e., the Internet), (ii) allows to identify ICN(More)
Recently, it has been proposed to use a peer-to-peer network instead of servers to facilitate SIP user registration and location. One of the main security problems of using SIP in a peer-to-peer setting (P2P-SIP) is the authentication of content (the binding of SIP-URI and user location) in the absence of a central authority. Using self-certifying data is(More)
The prevention of Spam over IP telephony (SPIT) is one of the greatest challenges for future large-scale deployments of VoIP telephony solutions. Some useful information for detecting SPIT calls is only available at the caller’s VoIP provider. Recent approaches therefore suggest the signalling of such information among providers. However, there is currently(More)