电子学报2025，Vol.53Issue(2)：460-473,14.DOI:10.12263/DZXB.20221020
基于区块链的可审计隐私保护机密交易
Blockchain-Based Privacy-Preserving Auditable Confidential Transaction Scheme
摘要
Abstract
Most current blockchain systems can hardly concurrently satisfy requirements of privacy protection and transaction data auditing.Bitcoin adopts the method of unspent transaction output(UTXO)to ensure that users can quickly query the source as well as fund destinations of each transaction,in order to avoid double spending threats.However,the us-ers'behaviors,deemed to be privacy,maybe traced by adversaries,since transactions with addresses are stored in the ledger publicly.Even though encryption-based solutions are widely adopted,it often causes restrictions to transaction verifications and auditing.In this paper,we propose an auditable privacy-preserving confidential transaction scheme,which uses Peder-son commitment to realize the public verifiability of the transaction rationality without disclosing the specific amount of the transaction.Our scheme supports the initiator of the transaction to initiate the transaction independently without permissions from the receiver,which saves the communication cost comparing with other confidential transaction schemes.By introduc-ing the trapdoor mechanism,the identity of the transaction initiator cannot be recognized by other users outside the ledger and the supervisor,so as to protect users'privacy.It has realized a variety of audit functions,and different audit methods have been developed according to regulators and private auditors.This paper presents a new range proof method,which has advantages over Prcash when applied to large numbers.The generation time of range proof for 512 bit large numbers is shortened 29.78%,and the generation time of range proof for 1 024 bit large numbers is reduced 56.86%.关键词
可审计/零知识证明/Pederson承诺/同态加密/范围证明Key words
auditable/zero-knowledge proof/Pederson commitments/homomorphic encryption/range proof分类
信息技术与安全科学引用本文复制引用
盖珂珂,陈思源,祝烈煌..基于区块链的可审计隐私保护机密交易[J].电子学报,2025,53(2):460-473,14.基金项目
国家重点研发计划(No.2021YFB2701300) National Key Research and Development Program(No.2021YFB2701300) （No.2021YFB2701300）
