Relaxed Sender Anonymity for CBDC Interbank Settlement: A Zero-Knowledge Approach on Permissioned EVM
This work realizes the protocol on Hyperledger Besu using QBFT consensus, combining Groth16 zero-knowledge proofs over BN254, Poseidon hash commitments in an incremental Merkle tree, multi-recipient ECIES payload encryption, and an on-chain NoteRegistry contract that stores encrypted notes as an append-only ledger log,...