This guidance is intended to assist the users of these recording devices in determining whether they are a ‘controller’ with obligations under data protection law, or whether their actions fall within the personal or household exemption, as well as what those obligations are and what steps users can take to ensure that they use these technologies in compliance with data protection law. This guidance also briefly discusses the use of these technologies for law enforcement purposes, although this is not the focus of this guidance note.
EDPB guidelines on processing personal data through blockchains
These guidelines aim to clarify how data protection laws, particularly the GDPR, apply to blockchain systems.