Michael T. Hunter

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The recent diversification of telephony infrastructure allows users to communicate through landlines, mobile phones and VoIP phones. However, call metadata such as Caller-ID is either not transferred or transferred without verification across these networks, allowing attackers to maliciously alter it. In this paper, we develop PinDr0p, a mechanism to assist(More)
The IP Multimedia Subsystem (IMS) is the basis for a significant new architecture for mobile applications incorporating voice, video and data services. The IMS is an overlay network on top of IP that uses SIP as the primary signaling mechanism. The IMS presents several new security challenges for both network providers and network users. This paper provides(More)
Formal election observation involves appointed ob- servers recording and reporting remote observations over the duration of an election and analysts promptly issuing conclusions based on studying these observations. This paper discusses the design and performance of eDemocs (Electronic Distributed Election Monitoring over Cellular Systems), created to aid(More)
The IP Multimedia Subsystem (IMS) is being widely adopted as the standard service delivery architecture for Next Generation Networks. The IMS delivers rich IP-based multimedia services to end users. In order to fully utilize the potential of the IMS, the convergence of the World Wide Web and IMS capabilities is imperative. Services composed of Web 2.0(More)
Internet users face challenges in evaluating the validity of online information. Such evaluation is not adequately supported by current tools; we outline some of the shortcomings of these tools, including centralization, lack of automation, and lack of user-centrism. We propose a set of design principles to mitigate these shortcomings and introduce ALPACA,(More)
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