Welcome to the resource topic for 2024/879
Title:
Consistency-or-Die: Consistency for Key Transparency
Authors: Joakim Brorsson, Elena Pagnin, Bernardo David, Paul Stankovski Wagner
Abstract:In this paper we point out the problem of insufficient tools for protecting against split-view attacks in Key Transparency protocols, and propose a solution to fill the void. We discuss why current approaches are not suitable and then propose a novel notion, GOD-less broadcast, that solves the issue. Like conventional notions of broadcast, GOD-less broadcast guarantees consistency. However, it does not provide Guaranteed Output Delivery (GOD). We provide an efficient realization of this new notion using a hidden committee of randomly selected and initially undisclosed users which endorse the current view. We also introduce and analyze a new concept of a quorum which ensures consistency among all honest active users. Our GOD-less broadcast protocol is practical and applicable to existing large scale Key Transparency systems, e.g. the Key Transparency used in WhatsApp.
ePrint: https://eprint.iacr.org/2024/879
See all topics related to this paper.
Feel free to post resources that are related to this paper below.
Example resources include: implementations, explanation materials, talks, slides, links to previous discussions on other websites.
For more information, see the rules for Resource Topics .