PRIDE: A Privacy-Preserving Decentralised Key Management System

David Kester, Tianyu Li, Zekeriya Erkin

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

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Abstract

There is an increase in interest and necessity for an interoperable and efficient railway network across Europe, creating a key distribution problem between train and trackside entities’ key management centres (KMC). Train and trackside entities establish a secure session using symmetric keys (KMAC) loaded beforehand by their respective KMC using procedures that are not scalable and prone to operational mistakes. A single system would simplify the KMAC distribution between KMCs; nevertheless, it is difficult to place the responsibility for such a system for the whole European area within one central organization. A single system could also expose relationships between KMCs, revealing information, such as plans to use an alternative route or serve a new region, jeopardizing competitive advantage. This paper proposes a scalable and decentralised key management system that allows KMC to share cryptographic keys using transactions while keeping relationships anonymous. Using non-interactive proofs of knowledge and assigning each entity a private and public key, private key owners can issue valid transactions while all system actors can validate them. Our performance analysis shows that the proposed system is scalable when a proof of concept is implemented with settings close to the expected railway landscape in 2030.
Original languageEnglish
Title of host publicationProceedings of the 2022 IEEE International Workshop on Information Forensics and Security (WIFS)
PublisherIEEE
Pages1-6
Number of pages6
ISBN (Electronic)979-8-3503-0967-6
ISBN (Print)979-8-3503-0968-3
DOIs
Publication statusPublished - 2022
Event 2022 IEEE International Workshop on Information Forensics and Security (WIFS) - Shanghai, China
Duration: 12 Dec 202216 Dec 2022

Workshop

Workshop 2022 IEEE International Workshop on Information Forensics and Security (WIFS)
Country/TerritoryChina
CityShanghai
Period12/12/2216/12/22

Bibliographical note

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

  • blockchain
  • key management
  • privacy-preserving
  • proofs of knowledge
  • ertms

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