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Identity protocols enable farmers market vouchers through decentralized identifiers (DIDs) linked to verifiable credentials (VCs). Vendors and customers use DIDs to issue and redeem vouchers via smart contracts, which validate eligibility (e.g., income level, residency) using zero-knowledge proofs (ZKPs). Blockchain audit trails track transactions, preventing fraud, while self-sovereign identity (SSI) lets users control data sharing. Local governments can issue subsidized vouchers securely, ensuring compliance with welfare programs.

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