Cryptology ePrint Archive: Report 2021/875

Hybrid Signal protocol for post-quantum email encryption

Sara Stadler and Vitor Sakaguti and Harjot Kaur and 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.

Category / Keywords: cryptographic protocols / Signal protocol, post-quantum, email encryption

Date: received 25 Jun 2021

Contact author: pqmail at tutao de

Available format(s): PDF | BibTeX Citation

Version: 20210629:114237 (All versions of this report)

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