Welcome to the resource topic for 2022/1090
Title:
How fast do you heal? A taxonomy for post-compromise security in secure-channel establishment
Authors: Olivier Blazy, Ioana Boureanu, Pascal Lafourcade, Cristina Onete, Léo Robert
Abstract:Post-Compromise Security (PCS) is a property of secure-channel establishment schemes, which limits the security breach of an adversary that has compromised one of the endpoint to a certain number of messages, after which the channel heals. An attractive property, especially in view of Snowden’s revelation of mass-surveillance, PCS was pioneered by the Signal messaging protocol, and is present in OTR. In this paper, we introduce a framework for quantifying and comparing PCS security, with respect to a broad taxonomy of adversaries. The generality and flexibility of our approach allows us to model the healing speed of a broad class of protocols, including Signal, but also an identity-based messaging protocol named SAID, and even a composition of 5G handover protocols.
ePrint: https://eprint.iacr.org/2022/1090
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