[Resource Topic] 2021/875: Hybrid Signal protocol for post-quantum email encryption

Welcome to the resource topic for 2021/875

Title:
Hybrid Signal protocol for post-quantum email encryption

Authors: Sara Stadler, Vitor Sakaguti, Harjot Kaur, Anna Lena Fehlhaber

Abstract:

The Signal protocol is used in many messaging applications today. While it is an active research topic to design a post-quantum variant of the protocol, no such variant is currently realized in the real world. In the following document we describe a hybrid version of the Signal protocol, that will be implemented to achieve post-quantum security for Tutanota’s end-to-end encrypted e-mails.

ePrint: https://eprint.iacr.org/2021/875

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