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Authors: Clemens Brunner ; Fabian Knirsch ; Andreas Unterweger and Dominik Engel

Affiliation: Center for Secure Energy Informatics, Salzburg University of Applied Sciences, Urstein Süd 1, Puch bei Hallein, Austria

Keyword(s): Blockchain, PKI, Web of Trust, X.509.

Abstract: Blockchain technology has recently been proposed by many authors for decentralized key management in the context of Public Key Infrastructures (PKIs). Instead of relying on trusted key servers – centralized or decentralized –, the confirmation and revocation of keys is distributed over a multitude of participants. A pletheora of implementations exist, all of which rely on different properties of blockchains. In this paper, we motivate the most relevant properties of blockchains as well as PKI and how they are linked. Furthermore, we provide an overview of state-of-the-art blockchain-based PKI implementations and compare them with respect to these properties. While all analyzed implementations fullfil the basic requirements of PKIs, we find that (i) privacy is very often neglected; and (ii) only a small subset is evaluated with respect to both, complexity and cost. In order to provide a guideline for future blockchain-based PKI implementations, we conclude with a set of recommendation s based on our findings. (More)

CC BY-NC-ND 4.0

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Paper citation in several formats:
Brunner, C.; Knirsch, F.; Unterweger, A. and Engel, D. (2020). A Comparison of Blockchain-based PKI Implementations. In Proceedings of the 6th International Conference on Information Systems Security and Privacy - ICISSP; ISBN 978-989-758-399-5; ISSN 2184-4356, SciTePress, pages 333-340. DOI: 10.5220/0008914503330340

@conference{icissp20,
author={Clemens Brunner. and Fabian Knirsch. and Andreas Unterweger. and Dominik Engel.},
title={A Comparison of Blockchain-based PKI Implementations},
booktitle={Proceedings of the 6th International Conference on Information Systems Security and Privacy - ICISSP},
year={2020},
pages={333-340},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0008914503330340},
isbn={978-989-758-399-5},
issn={2184-4356},
}

TY - CONF

JO - Proceedings of the 6th International Conference on Information Systems Security and Privacy - ICISSP
TI - A Comparison of Blockchain-based PKI Implementations
SN - 978-989-758-399-5
IS - 2184-4356
AU - Brunner, C.
AU - Knirsch, F.
AU - Unterweger, A.
AU - Engel, D.
PY - 2020
SP - 333
EP - 340
DO - 10.5220/0008914503330340
PB - SciTePress