1. Protecting the 4G and 5G Cellular Paging Protocols against Security and Privacy Attacks 2020 CellularProtocols PETS
    Ankush Singla, Syed Rafiul Hussain, Omar Chowdhury, Elisa Bertino, Ninghui Li
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    author = {Ankush Singla and Syed Rafiul Hussain and Omar Chowdhury and Elisa Bertino and Ninghui Li},
    title = {Protecting the {4G} and {5G} Cellular Paging Protocols against Security and Privacy Attacks},
    journal = {PoPETs},
    volume = {2020},
    number = {1},
    year = {2020},

This paper focuses on protecting the cellular paging protocol — which balances between the quality-of-service and battery consumption of a device— against security and privacy attacks. Attacks against this protocol can have severe repercussions, for instance,allowing attacker to infer a victim’s location, leak a victim’s IMSI, and inject fabricated emergency alerts.To secure the protocol, we first identify the underlying design weaknesses enabling such attacks and then pro-pose efficient and backward-compatible approaches to address these weaknesses. We also demonstrate the deployment feasibility of our enhanced paging protocol by implementing it on an open-source cellular protocol library and commodity hardware. Our evaluation demonstrates that the enhanced protocol can thwart attacks without incurring substantial overhead.