An efficient and secure Two-party Adaptor Signature Based on SM9 Signature

An efficient and secure Two-party Adaptor Signature Based on SM9 Signature | 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 Research Article An efficient and secure Two-party Adaptor Signature Based on SM9 Signature Xuan Hong, Zhenting Chen This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6287117/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 Adaptor signatures, a novel cryptographic primitive extended from standard signatures, provide an efficient and cost-effective solution to blockchain’s scalability. By embedding witness of a preset hard relation within the pre-signature value, adaptor signatures ensure that only those who know the witness can transform the pre-signature into a complete signature. This technique has been widely applied in payment channels and atomic swaps. In this work, we propose a two-party adaptor signature scheme based on the SM9 algorithm to enhance the scalability of identity-based blockchains while mitigating the risk of private key leakage. We prove the security of the scheme within the random oracle model. Additionally, we analyze the computational and communication overheads of our scheme compared to existing two-party adaptor signature schemes, demonstrating that it offers higher computational efficiency. Finally, we explore the potential application of our scheme in atomic swaps. Adaptor signature SM9 Two-party signature Blockchain 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. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. 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-6287117","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":453038152,"identity":"85e90ffa-b91e-4812-8247-851889ca085c","order_by":0,"name":"Xuan Hong","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAsklEQVRIiWNgGAWjYBACAxDxgeEAmCNBtBbGGSRrYeYhSYs5e+/h1zZ/7uQZHGA+eJuHwS6PoBbLnnNp1rltz4oNDrAlW/MwJBcTdtiNHDPj3IbDiRsO8JhJA12Y2ECUFos/IC3834jWYvyYgQ1sCxuRWs6cMWPsbTucOPMwm7HlHINkIrQc7zH+8APosL7jzQ9vvKmwI6wFCNgg0cEMNoEI9SC1H4hTNwpGwSgYBSMWAAB6RT/rwJFrKQAAAABJRU5ErkJggg==","orcid":"","institution":"Shanghai Normal University","correspondingAuthor":true,"prefix":"","firstName":"Xuan","middleName":"","lastName":"Hong","suffix":""},{"id":453038153,"identity":"862e24e1-aaf5-46bc-9540-91c0e3da52f3","order_by":1,"name":"Zhenting Chen","email":"","orcid":"","institution":"Shanghai Normal University","correspondingAuthor":false,"prefix":"","firstName":"Zhenting","middleName":"","lastName":"Chen","suffix":""}],"badges":[],"createdAt":"2025-03-23 08:08:09","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-6287117/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-6287117/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":83796051,"identity":"4b52a103-81a9-4f4e-8299-b1a82a8d2c6f","added_by":"auto","created_at":"2025-06-03 00:31:28","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":351838,"visible":true,"origin":"","legend":"","description":"","filename":"Elserviertemplatev2.pdf","url":"https://assets-eu.researchsquare.com/files/rs-6287117/v1_covered_2e1d370a-ab98-423c-9560-8e4ef0ba9aa6.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"An efficient and secure Two-party Adaptor Signature Based on SM9 Signature","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":"Adaptor signature, SM9, Two-party signature, Blockchain","lastPublishedDoi":"10.21203/rs.3.rs-6287117/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-6287117/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"Adaptor signatures, a novel cryptographic primitive extended from standard signatures, provide an efficient and cost-effective solution to blockchain’s scalability. 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