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Executive Summary

Blockchain technology has advanced

tremendously over the past decade, and now

provides a viable alternative to traditional

database solutions. In particular it is suggesting

dramatic advancements in solutions for recording,

processing and sharing information: offering

decentralisation, accessibility and reliability.

However, the EU's recently enacted General Data

Protection Regulation (GDPR) poses significant

compliance hurdles to the ongoing development

of blockchain-based solutions involving storing

and transacting with data about individuals.

This paper identifies some of these hurdles, such as

the GDPR rights to have one's personal data deleted

or corrected, which sit at odds with the very concept

of an immutable blockchain. This paper will also offer

suggestions on how best to implement GDPR-compliant

blockchain solutions. Rather than offering a theoretical

discussion on creating a GDPR-compliant blockchain

solution, this publication examines a realworld use case

developed by Marine Transport International (a UK-based

digital logistics enabler) to provide practical solutions to

the issues the GDPR poses to blockchain implementers.

What we have identified in writing this publication is

that not all of the blockchain challenges posed by the

GDPR and other privacy regimes can currently be bridged.

However, we do feel that the gap left by those challenges

is relatively small, and the fundamental freedoms forming

the policy behind such privacy laws can be maintained and

protected in particular blockchain environments. However,

this will require both lawmakers and regulators to take an

active and pragmatic approach to blockchain technology.

We believe that a blockchain solution that respects the

fundamental principles of data protection and privacy is

achievable if the following four guiding principles

are followed.

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