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2 - Potential solution: Governance

A first line of defence to help avoid personal data being

included on the blockchain would be to implement a

contractual governance framework that obliges individuals

not to upload personal data to the network and minimises

free form data. We will come back to this in the next

section but, given the possibility of personal data

inadvertently making its way onto the network, this is

not necessarily a perfect solution.

3 - Potential solution: Technical measures to redact

personal data (design considerations)

Another principal means of keeping personal data off

the blockchain network is to implement technological

measures in blockchain middleware. Blockchain

middleware applications can seek to prevent personal

data being added to the network by avoiding the inclusion

of specific data fields for personal data such as fields

for names, phone numbers or email addresses. These

applications can also employ more advanced techniques

to recognise and remove personal data from information

submitted to the blockchain network. AI or machine

learning-based tools can, for example, be employed

to recognise and blur faces in images before they are

submitted to the network.

Middleware

Blockchain middleware is software that sits on top

of one or more underlying blockchain networks

and facilitates the application of those blockchain

networks to particular use cases. Almost all

interactions with blockchain networks will occur

via blockchain middleware. Some of the most

exciting innovation in the blockchain arena is

occurring in blockchain middleware.

Blockchain

Middleware

GDPR and the Blockchain I 23

Index

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