Amigo is a mesh messaging system for protesters that combines a tailored CGKA with a new clique-based routing protocol. It employs end-to-end encryption of authenticated messages, ensures that an attacker cannot break the confidentiality of messages sent before their attack, and provides post-compromise security means where an attacker cannot break the confidentiality of messages sent after their attack. Thus, Amigo achieves secure group mesh messaging in the large-scale protest setting.
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Inyangson, David, Sarah Radway, Tushar M. Jois, Nelly Fazio, and James Mickens. “Amigo: Secure Group Mesh Messaging in Realistic Protest Settings.” Proceedings of the 2025 ACM SIGSAC Conference on Computer and Communications Security, November 19, 2025, 4244–58. https://doi.org/10.1145/3719027.3765133.
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