Zero-Knowledge Proof and its Application in Distributed Registry Systems

Existing distributed ledger systems ensure the integrity and availability of information, but they lack built-in mechanisms to ensure the confidentiality of transaction data recorded in the ledger. Any intruder can obtain all transaction data by downloading a copy of the ledger and trace the relationships between transactions and accounts. Thus, additional mechanisms are needed to ensure the confidentiality of transactions. One solution to this problem is to use a zero-knowledge proof protocol. This article discusses the use of zero-knowledge proof to ensure the confidentiality of transactions in distributed ledger systems. We consider both the UTXO-model and the account model.