Extends a prior privacy-preserving payment protocol using zero-knowledge proofs over an audit log to verify reissuance compliance without exposing payer identity, while highlighting a security property that payers need not retain cross-transaction secrets.
Prove(crs,x,w ): Take as input the crs, a statement x and a witness w such that (x,w )∈R and returns a proof π
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Private Electronic Payments with Self-Custody and Zero-Knowledge Verified Reissuance
Extends a prior privacy-preserving payment protocol using zero-knowledge proofs over an audit log to verify reissuance compliance without exposing payer identity, while highlighting a security property that payers need not retain cross-transaction secrets.