Revisiting Privacy-aware Blockchain Public Key Infrastructure

Paul Plessing, Olamide Omolola

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearch

Abstract

Privacy-aware Blockchain Public Key Infrastructure (PB-PKI) is a recent proposal by Louise Axon (2017) to create a privacy-preserving Public Key Infrastructure on the Blockchain. However, PB-PKI suffers from operational problems. We found that the most important change, i.e., the key update process proposed in PB-PKI for privacy is broken. Other issues include authenticating a user during key update and ensuring proper key revocation. In this paper, we provide solutions to the problems of PB-PKI. We suggest generating fresh keys during key update. Furthermore, we use ring signatures for authenticating the user requesting key updates and use Asynchronous accumulators to handle the deletion of revoked keys. We show that the approach is feasible and implement a proof of concep
Original languageEnglish
Title of host publicationProceedings of the 6th International Conference on Information Systems Security and Privacy
PublisherSciTePress - Science and Technology Publications
Pages415-423
Volume1
ISBN (Print)978-989-758-399-5
DOIs
Publication statusPublished - 2020
Event6th International Conference on Information Systems Security and Privacy - Valletta, Malta
Duration: 25 Feb 202027 Feb 2020

Conference

Conference6th International Conference on Information Systems Security and Privacy
Abbreviated titleICISSP 2020
CountryMalta
CityValletta
Period25/02/2027/02/20

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Plessing, P., & Omolola, O. (2020). Revisiting Privacy-aware Blockchain Public Key Infrastructure. In Proceedings of the 6th International Conference on Information Systems Security and Privacy (Vol. 1, pp. 415-423). SciTePress - Science and Technology Publications. https://doi.org/10.5220/0008947104150423