Eugenio Reggianini, in a proposal aimed at GDPR compliance, by implementing role separation, ensures that block builders and sequencers never access transaction contents directly

Quotes that support claims

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.

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).