Cas Cremers (CISPA Helmholtz Center for Information Security), Martin Dehnel-Wild (University of Oxford)

The 5G mobile telephony standards are nearing completion; upon adoption these will be used by billions across the globe. Ensuring the security of 5G communication is of the utmost importance, building trust in a critical component of everyday life and national infrastructure.

We perform a fine-grained formal analysis of 5G’s main authentication and key agreement protocol (5G-AKA), and provide the first models that explicitly consider all parties defined by the protocol specification. Our formal analysis reveals that the security of 5G-AKA critically relies on unstated assumptions on the inner workings of the underlying channels. In practice this means that following the 5G-AKA specification, a provider can easily and ‘correctly’ implement the standard insecurely, leaving the protocol vulnerable to a security-critical race condition. We then provide the first models and analysis considering component and channel compromise in 5G, the results of which further demonstrate the fragility and subtle trust assumptions of the 5G-AKA protocol.

We propose formally verified fixes to the encountered issues, and we have worked with 3GPP to ensure that these fixes are adopted.

View More Papers

Robust Performance Metrics for Authentication Systems

Shridatt Sugrim (Rutgers University), Can Liu (Rutgers University), Meghan McLean (Rutgers University), Janne Lindqvist (Rutgers University)

Read More

Oligo-Snoop: A Non-Invasive Side Channel Attack Against DNA Synthesis...

Sina Faezi (University of California, Irvine), Sujit Rokka Chhetri (University of California, Irvine), Arnav Vaibhav Malawade (University of California, Irvine), John Charles Chaput (University of California, Irvine), William Grover (University of California, Riverside), Philip Brisk (University of California, Riverside), Mohammad Abdullah Al Faruque (University of California, Irvine)

Read More

Thunderclap: Exploring Vulnerabilities in Operating System IOMMU Protection via...

A. Theodore Markettos (University of Cambridge), Colin Rothwell (University of Cambridge), Brett F. Gutstein (Rice University), Allison Pearce (University of Cambridge), Peter G. Neumann (SRI International), Simon W. Moore (University of Cambridge), Robert N. M. Watson (University of Cambridge)

Read More

SANCTUARY: ARMing TrustZone with User-space Enclaves

Ferdinand Brasser (Technische Universität Darmstadt), David Gens (Technische Universität Darmstadt), Patrick Jauernig (Technische Universität Darmstadt), Ahmad-Reza Sadeghi (Technische Universität Darmstadt), Emmanuel Stapf (Technische Universität Darmstadt)

Read More