Abstract：Blockchainlibraries and the data deluge In the age of the data delugelibrariansresearchers and citizens in general are facedwith theproblemof knowingin an ever-growing glut of electronic informationwhat is trustworthyandbelievableWe live in anageoffakenewsacademicfraudspindoctoringfarkinternet scams andvariousother formsofmisleadingdeceptive and elusive approaches to interpretingandpresentinginformationWhileaslibrariansweareawareofa number of techniques for identifyinglocating and accessing reliable informationour ability to do this is often challenged by factors such as shady informationprovidersbecoming particularly crafty at simulating the appearanceofareputablesourcetime limitations placed on librarians for thoroughlyinvestigatingtheoriginand nature of the resources we use and increasing budget pressures that limit theabilitytopurchaseorotherwiseget access to all of the best quality informationsourceswemight requireAt conferencesin online discussions and in journal literaturethere is an increasingamountofchatterabout the abilityofblockchaintoaddressthetrust and reliability issueswhich are increasinglyproblematicinourcurrent approaches to information access and disseminationThis instalment of the data deluge discusses some of the literaturepublishedover thepast three to four years about the potential and useofblockchaininenvironmentsand applicationssuchasthoseusedinorby librariesMuchof the literature reviewedfor thiscolumniswhatmightbecalledgrey literatureopinionpiecesandproposals forhowblockchainmightbeappliedIt is a common topicat conferences for technologyinformation and finance professionalsGovernments and other organizations have commissioned reportsandwhitepapersonitThereare numerousdiscussionsanddescriptions about how blockchain is currently implementedwhile there seems tobe evenmoreopinionpiecestakingarange ofpositionsabouthowblockchainisthe new great technological disruptor to howit isanimpractical shinynewtoy that is likely to quickly fall into obscurityThefactthatitwasextremely easy tofindmore articlesblogposts and conference presentations than it was possible to read in a reasonable amountof time isevidence that it isa topic of high interestProfessional journals for librarians generallycover thetopicbut therelativelackofpeer reviewedarticlesspecificallypublished in library and information science journalson the other handsuggests that it isnotatechnologythathasbeen adoptedinasignificantwayinlibrariesNowseems tobeaperfect timeforall librarianstoengagewithlearningmore aboutblockchainandformingtheirown ideas about where and how it may benefit or otherwise impact on their workLibrary AutomationThrough blockchain technologylibraries can better verify and store informationConsulting ServiceLibrary needs to learn and understand blockchain technology to better provide readers with consultation and suggestionsRetrieval and IndexingBlockchain can help ensure the authenticity and consistency of the datawhich makes retrieval and index more reliableInstificational CollectionThrough blockchain technologythe institutional collection can ensure the authenticity and invariance of its collection dataThis article explores how people distinguish between reliable and real information in the current era of information explosionDue tofake newsand academic fraudit becomes more difficult to find reliable information sourcesEspecially when some unfair information providers imitate the appearance of the reliable sourceIn this contextthe article mentioned that blockchain technology may be a way to solve these trust and reliability issuesThe expert system here means that the blockchain as a technology can be used to ensure the authenticity and reliability of the information