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Authors: Zsolt Tujner 1 ; Thomas Rooijakkers 2 ; Maran van Heesch 2 and Melek Önen 3

Affiliations: 1 TNO, The Hague, The Netherlands, EURECOM, Sophia-Antipolis, France ; 2 TNO, The Hague, The Netherlands ; 3 EURECOM, Sophia-Antipolis, France

Keyword(s): Tor, Anonymous Routing, Post-quantum Cryptography.

Abstract: We propose a study on the use of post-quantum cryptographic primitives for the Tor network in order to make it safe in a quantum world. With this aim, the underlying keying material has first been analysed. We observe that breaking the security of the algorithms/protocols that use long- and medium-term keys (usually RSA keys) have the highest impact in security. Therefore, we investigate the cost of quantum-safe variants. Six different post-quantum cryptographic algorithms that ensure level 1 NIST security are evaluated. We further target the Tor circuit creation operation and evaluate the overhead of the post-quantum variant. This comparative study is performed through a reference implementation based on SweetOnions that simulates Tor with slight simplifications. We show that a quantum-safe Tor circuit creation is possible and suggest two versions - one that can be used in a purely quantum-safe setting, and one that can be used in a hybrid setting.

CC BY-NC-ND 4.0

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Paper citation in several formats:
Tujner, Z.; Rooijakkers, T.; van Heesch, M. and Önen, M. (2020). QSOR: Quantum-safe Onion Routing. In Proceedings of the 17th International Joint Conference on e-Business and Telecommunications - SECRYPT; ISBN 978-989-758-446-6; ISSN 2184-7711, SciTePress, pages 618-624. DOI: 10.5220/0009869206180624

@conference{secrypt20,
author={Zsolt Tujner. and Thomas Rooijakkers. and Maran {van Heesch}. and Melek Önen.},
title={QSOR: Quantum-safe Onion Routing},
booktitle={Proceedings of the 17th International Joint Conference on e-Business and Telecommunications - SECRYPT},
year={2020},
pages={618-624},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0009869206180624},
isbn={978-989-758-446-6},
issn={2184-7711},
}

TY - CONF

JO - Proceedings of the 17th International Joint Conference on e-Business and Telecommunications - SECRYPT
TI - QSOR: Quantum-safe Onion Routing
SN - 978-989-758-446-6
IS - 2184-7711
AU - Tujner, Z.
AU - Rooijakkers, T.
AU - van Heesch, M.
AU - Önen, M.
PY - 2020
SP - 618
EP - 624
DO - 10.5220/0009869206180624
PB - SciTePress