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In late 2018, researchers at SINTEF Digital Norway, ETH Zurich, and Berlin's Technical University discovered a new and serious vulnerability in several generations of the cellular mobile communications protocols: 3G, 4G, and the upcoming 5G. The flaw affected Authentication and Key Agreement, which negotiates and establishes authentication between cellular networks and users' phones. AKA as designed for 5G was intended to close a vulnerability in 3G and 4G that allows fake base stations, known…