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ThinkMind // CYBER 2020, The Fifth International Conference on Cyber-Technologies and Cyber-Systems // View article cyber_2020_2_30_80051


Dismissing Poisoned Digital Evidence from Blockchain of Custody

Authors:
David Billard

Keywords: Digital Evidence; Blockchain; Chain of custody; Privacy

Abstract:
This paper presents a solution to dismiss a digital evidence from a permissioned blockchain-based legal system, serving as evidence chain of custody. When challenged into court, a digital evidence can be entirely dismissed, as well as all the procedural acts originating from this evidence, including personal gathered data. Since a blockchain, by design, cannot be altered, this paper proposes an alternative solution based on an access control to the blockchain. This solution relies on an additional structure, linked to the blockchain, representing the history and current legal state of the case. Access to the blockchain is controlled by first interrogating this additional structure in order to serve only legally accepted evidence. Therefore, an evidence stored into the blockchain is not destroyed, but is no longer visible nor accessible. Furthermore, evidence data is separated from the blockchain transaction’s payload, that holds only metadata, and this separation reinforces privacy protection. The solution presented in this paper is explainable to all parties to a court trial.

Pages: 42 to 47

Copyright: Copyright (c) IARIA, 2020

Publication date: October 25, 2020

Published in: conference

ISSN: 2519-8599

ISBN: 978-1-61208-818-1

Location: Nice, France

Dates: from October 25, 2020 to October 29, 2020

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