Computer Science > Computer Science and Game Theory
[Submitted on 29 May 2024 (v1), last revised 31 Oct 2024 (this version, v2)]
Title:Pessimism of the Will, Optimism of the Intellect: Fair Protocols with Malicious but Rational Agents
View PDF HTML (experimental)Abstract:Fairness is a desirable and crucial property of many protocols that handle, for instance, exchanges of message.
It states that if at least one agent engaging in the protocol is honest, then either the protocol will unfold correctly and fulfill its intended goal for all participants, or it will fail for everyone.
In this work, we present a game-based framework for the study of fairness protocols, that does not define a priori an attacker model.
It is based on the notion of strong secure equilibria, and leverages the conceptual and algorithmic toolbox of game theory.
In the case of finite games, we provide decision procedures with tight complexity bounds for determining whether a protocol is immune to nefarious attacks from a coalition of participants, and whether such a protocol could exist based on the underlying graph structure and objectives.
Submission history
From: Léonard Brice [view email][v1] Wed, 29 May 2024 10:15:36 UTC (262 KB)
[v2] Thu, 31 Oct 2024 10:36:04 UTC (266 KB)
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