Protocol insecurity with finitely many sessions and XOR

June 30, 2025 · The Ethereal · 🏛 arXiv.org

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Authors R Ramanujam, Vaishnavi Sundararajan, S P Suresh arXiv ID 2506.24072 Category cs.LO: Logic in CS Cross-listed cs.CR Citations 0 Venue arXiv.org Last Checked 5 months ago
Abstract
We present a different proof of the insecurity problem for XOR, solved in by Chevalier, Kuesters, Rusinowitch and Turuani (2005). Our proof uses the notion of typed terms and well-typed proofs, and removes a restriction on the class of protocols to which the [CKRT05] proof applies, by introducing a slightly different (but very natural) notion of protocols, where honest agent sends are derivable from previous receives in the same session.
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