A Framework for Anonymizing GSM Calls over a Smartphone VoIP Network

Abstract : The proposed framework describes a service for users that gives them the ability to make gsm calls from their smartphones without revealing their identity. The principle to achieve that is simple: instead of using your cell phone to make a call, pick somebody else’s phone to do so. We proposed an infrastructure of smartphones, sip registrars and sip proxies to provide caller anonymity. We developed a testbed where a smartphone registers on a SIP registrar and can start GSM conversation through another smartphone acting as a GSM gateway, by using a SIP proxy. Empirical evaluation revealed no significant QoS degradation.
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Ioannis Psaroudakis, Vasilios Katos, Pavlos Efraimidis. A Framework for Anonymizing GSM Calls over a Smartphone VoIP Network. 27th Information Security and Privacy Conference (SEC), Jun 2012, Heraklion, Crete, Greece. pp.543-548, ⟨10.1007/978-3-642-30436-1_46⟩. ⟨hal-01518226⟩

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