Paper 2023/1960
Post Quantum Sphinx
Abstract
This paper introduces two designs of Sphinx variants with corresponding im- plementations for use in post-quantum threat models with a specific focus on Mix networks. We introduce an obvious variant of Sphinx with CSIDH/CTIDH and we additionally introduce ’KEM Sphinx’, an enhanced version of the Sphinx packet format, designed to improve performance through modifications that increase packet header size. Unlike its predecessor, KEM Sphinx addresses performance limitations inherent in the original design, offering a solution that doubles processing speed. Our analysis extends to the adaptation of KEM Sphinx in a post-quantum cryptographic context, showing a transition with minimal performance degradation. The study concludes that the trade-off be- tween increased size and improved speed and security is justifiable, especially in scenarios demanding higher security. These findings suggest KEM Sphinx as a promising direction for efficient, secure communication protocols in an increas- ingly post-quantum cryptographic landscape.
Metadata
- Available format(s)
-
PDF
- Category
- Cryptographic protocols
- Publication info
- Preprint.
- Keywords
- sphinxhybrid post quantumnikekemanonymous communicationanonymity
- Contact author(s)
- dstainton415 @ gmail com
- History
- 2023-12-31: last of 3 revisions
- 2023-12-25: received
- See all versions
- Short URL
- https://ia.cr/2023/1960
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2023/1960,
author = {David Anthony Stainton},
title = {Post Quantum Sphinx},
howpublished = {Cryptology ePrint Archive, Paper 2023/1960},
year = {2023},
note = {\url{https://eprint.iacr.org/2023/1960}},
url = {https://eprint.iacr.org/2023/1960}
}
