| Title | PRIDE: A Privacy-Preserving Decentralised Key Management System |
| Publication Type | Conference Paper |
| Year of Publication | 2022 |
| Authors | Kester, David, Li, Tianyu, Erkin, Zekeriya |
| Conference Name | 2022 IEEE International Workshop on Information Forensics and Security (WIFS) |
| Keywords | blockchain, Conferences, ERTMS, Europe, Forensics, Human Behavior, Key Management, Metrics, Organizations, Performance analysis, Privacy-preserving, proofs of knowledge, pubcrawl, Public key, Rail transportation, Resiliency, Scalability |
| 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. |
| DOI | 10.1109/WIFS55849.2022.9975379 |
| Citation Key | kester_pride_2022 |
PRIDE: A Privacy-Preserving Decentralised Key Management System