Ethereum, in a proposal aimed at GDPR compliance, through protocol restructuring, adopts Proposer-Builder Separation to keep raw transaction data hidden from proposers

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Other PET integrations that could help with GDPR compliance include Fully Homomorphic Encryption and Trusted Execution Environments (TEEs), multiparty computation (MPC), Proposer-Builder Separation (PBS) and Peer Data Availability Sampling (PeerDAS).

Proposer-Builder Separation (PBS) & Attester-Proposer Separation (APS): Protocol-enforced splits concentrate data-viewing power in block builders, while proposers and attesters handle only commitments or proofs.