Bitfury白皮书对比特币区块链的重新解读.pdf

OnBlockchainAuditability WhitePaper Facilitating auditability and accountability are major benefits of using blockchain technology. In this whitepaper,weexaminethenotionsofauditability,accountabilityandnon-repudiationinblockchains andfocusontheaspectsofblockchaintechnologythatallowfortheseproperties. Wefocusonblock- chain receipts, blockchain anchoring, and proof of work as the means to provide non-repudiation and accountability in permissioned blockchains that utilize Byzantine consensus. A technical description to implement Bitcoin Blockchain anchoring for permissioned blockchains without reducing security propertiesisprovided. Version 1.0(Nov14,2016) ©2016BitfuryGroupLimited Withoutpermission,anyonemayuse,reproduceordistributeanymaterialinthispaperfornoncommercialand educationaluse(i.e., otherthanforafeeorforcommercialpurposes)providedthattheoriginalsourceandthe applicablecopyrightnoticearecited. Blockchain technology has been posited as a solution for various applications in the financial sphere, such as payment systems [1], securities trading [2], post-trade settlement [3], regulation [4], consulting and auditing [5, 6], etc. Furthermore, blockchains have been proposed for non-financial use cases including public registries [7], copyright [8] and provenance [9, 10]. Pragmatically, the reason of blockchain popularity may be simple: financial services and other applications are in a need of modernization, and blockchain technology seems to provide a solution [11]. Thus, the crucialquestionimpactingtheadoptionofblockchaintechnologyiswhetherthetechnologyprovides substantialbenefitscomparedtoalternatedigitalsolutions. Blockchains,asenvisionedbySatoshiNakamoto[12],combinethecharacteristicsofthreedistinct technologies: • Byzantinefault-tolerantsystems • Digitaltimestampingservices • Currencyledgersusingcryptographicprimitives On its own, each of these technologies were studied well before Nakamoto’s publication.