Information theoretically secure data relay using QKD network

Information theoretically secure data relay using QKD network | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Information theoretically secure data relay using QKD network Mikio Fujiwara, Go Kato, Toyohiro Tsurumaru, Masahide Sasaki This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4268352/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Supercomputers, quantum computers, other computers, and algorithmic advancements that can break cryptographic systems currently in use are becoming a reality. For information that requires long-term confidentiality (e.g. national security, military security, genomic data etc.), the threat of eavesdropping must be seriously considered. The leakage of such information would not only cause temporary confusion but would also have serious repercussions for future generations. Part of such important data are already being exchanged over the Internet using cryptography that is not resistant to quantum computers. Considering the possibility of harvest attacks on information that must be kept secret for centuries, developing a technology that can immediately eliminate the risk of eavesdropping in principle is desirable. In response to these demands, we previously developed an information-theoretically secure method for data transmission, storage, recovery, and authentication with a single password using a quantum key distribution network called a quantum secure cloud. We now apply this technology to develop an information-theoretically secure long-distance data-relay function and succeed in developing a distributed data-relay simulator that is compatible with current quantum key distribution networks. The throughput of this protocol is more than 10 Mbps for 10 MB data, so it can be applied to practical use. Physical sciences/Engineering Physical sciences/Physics Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-4268352","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":300846583,"identity":"eb7c5900-f923-4ea1-96d7-b5db938e425c","order_by":0,"name":"Mikio Fujiwara","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA1klEQVRIiWNgGAWjYBAC9gaGBBAtx8AMFWFsIKCF5wBEizFQC0QxMVrAILGBCMVQLRIJzyR+7rFL387O/PwBwy8bBubZBHQCtaRJ9jxLzt3ZzGbYwNiXxsA45wB+LfZALTd4DjDnbjjMw9jA2HOYgXFGAmFbbv45UJ9uQJKW2zwHDieAtTD8IEYLz4P03zIHjhtuOMxmOCOxIY2HoF942HOSDd8cqJY3OH/4wYcPf2zkDAmFGFATkjsS2xh4DGcQ0sHAjuyOPwwM8hIEtYyCUTAKRsEIAwCgGEWtysB5ywAAAABJRU5ErkJggg==","orcid":"","institution":"National Institute of Information and Communications Technology (NICT)","correspondingAuthor":true,"prefix":"","firstName":"Mikio","middleName":"","lastName":"Fujiwara","suffix":""},{"id":300846590,"identity":"88e36c9a-f7bd-4250-98bc-ef3ae634fb75","order_by":1,"name":"Go Kato","email":"","orcid":"","institution":"National Institute of Information and Communications Technology (NICT)","correspondingAuthor":false,"prefix":"","firstName":"Go","middleName":"","lastName":"Kato","suffix":""},{"id":300846597,"identity":"9dbfb215-d6db-47ba-b364-5bdaf057fd2c","order_by":2,"name":"Toyohiro Tsurumaru","email":"","orcid":"","institution":"Mitsubishi Electric Corp","correspondingAuthor":false,"prefix":"","firstName":"Toyohiro","middleName":"","lastName":"Tsurumaru","suffix":""},{"id":300846603,"identity":"838db9d5-eb3c-4c45-8752-c742b9b30cc6","order_by":3,"name":"Masahide Sasaki","email":"","orcid":"","institution":"National Institute of Information and Communications Technology (NICT)","correspondingAuthor":false,"prefix":"","firstName":"Masahide","middleName":"","lastName":"Sasaki","suffix":""}],"badges":[],"createdAt":"2024-04-15 08:35:28","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-4268352/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4268352/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":57404549,"identity":"58082c51-74de-4bb7-9e43-42eed76d67b6","added_by":"auto","created_at":"2024-05-30 08:56:57","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1476606,"visible":true,"origin":"","legend":"","description":"","filename":"InformationtheoreticallysecuredatarelayusingQKDnetwork20240412.pdf","url":"https://assets-eu.researchsquare.com/files/rs-4268352/v1_covered_689528e0-8d85-4907-87c0-0b36cb9cc358.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Information theoretically secure data relay using QKD network","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"","lastPublishedDoi":"10.21203/rs.3.rs-4268352/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4268352/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eSupercomputers, quantum computers, other computers, and algorithmic advancements that can break cryptographic systems currently in use are becoming a reality. 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