Hybrid Signal protocol for post-quantum email encryption

Sara Stadler; Vitor Sakaguti; Harjot Kaur; Anna Lena Fehlhaber

Paper 2021/875 Original: eprint.iacr.org/2021/875 ↗

Hybrid Signal protocol for post-quantum email encryption

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.

Metadata

Available format(s): PDF
Category: Cryptographic protocols
Publication info: Preprint.
History: 2021-06-29: last updated; 2021-06-29: published
Short URL: https://ia.cr/2021/875
License: https://creativecommons.org/licenses/by/4.0/

BibTeX

@misc{cryptoeprint:2021/875,
      author = {Sara Stadler and Vitor Sakaguti and Harjot Kaur and Anna Lena Fehlhaber},
      title = {Hybrid Signal protocol for post-quantum email encryption},
      howpublished = {Cryptology {ePrint} Archive, Paper 2021/875},
      year = {2021},
      url = {https://eprint.iacr.org/2021/875}
}