Asymmetric multiparameter optical cryptosystem using spatial and hyperchaotic spiral phase encoding for multiple single-channel images

Asymmetric multiparameter optical cryptosystem using spatial and hyperchaotic spiral phase encoding for multiple single-channel images | 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 Asymmetric multiparameter optical cryptosystem using spatial and hyperchaotic spiral phase encoding for multiple single-channel images Muhammad Rafiq Abuturab This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8981611/v1 This work is licensed under a CC BY 4.0 License Status: Under Revision Version 1 posted 15 You are reading this latest preprint version Abstract A novel optical cryptosystem that uses spatial and hyperchaotic spiral phase encoding for multiple single-channel images is proposed. For the first time to the author’s knowledge, hyperchaotic spiral phase mask (HSPM) has been introduced. In the encryption process, eight color images are decomposed individually into corresponding R , G , and B channels. R - R channel, G - G channel, and B - B channel pairs of two images are spatially phase encoded into a single complex amplitude channel independently. The four channel pairs are transformed separately using an inverse discrete wavelet transform to generate the fused R , G , and B channels. The sum of three fused channels and HSPM produces a complex image as input image. The complex image is modulated with HSPM and gyrator transformed. The amplitude and phase-truncation operations are executed to produce the first decryption key and first encrypted image. The procedure is repeated again to produce a second decryption key and final encrypted image. The parameters of HSPMs are exploited as encryption and decryption keys for multiple single-channel images. There are three main advantages to the proposed cryptosystem. The multiple parameters of HSPM are utilized as extremely sensitive decryption keys. Second, the multiple parameters of the first and second HSPMs are exploited as highly sensitive encryption keys. Finally, the proposed system circumvents problems caused by misalignment, which is an important issue in optical systems that require axial movements. A hybrid optoelectronic system can be exploited to implement the proposed system. The feasibility, efficacy, robustness, sensitivity, and security of the proposed scheme are verified by numerical simulation results. Physical sciences/Engineering Physical sciences/Mathematics and computing Physical sciences/Optics and photonics Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Revision Version 1 posted Editorial decision: Revision requested 30 Mar, 2026 Reviewers agreed at journal 28 Mar, 2026 Reviewers agreed at journal 28 Mar, 2026 Reviews received at journal 27 Mar, 2026 Reviews received at journal 25 Mar, 2026 Reviewers agreed at journal 25 Mar, 2026 Reviewers agreed at journal 23 Mar, 2026 Reviews received at journal 16 Mar, 2026 Reviewers agreed at journal 10 Mar, 2026 Reviewers agreed at journal 08 Mar, 2026 Reviewers invited by journal 08 Mar, 2026 Editor assigned by journal 06 Mar, 2026 Editor invited by journal 06 Mar, 2026 Submission checks completed at journal 04 Mar, 2026 First submitted to journal 04 Mar, 2026 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. 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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-8981611","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":604087267,"identity":"ff87dd5b-680e-41a3-8482-50a9e8fbb584","order_by":0,"name":"Muhammad Rafiq Abuturab","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA/UlEQVRIiWNgGAWjYFACxgcHgGQChN1gAyIbD+DXwmwA0cIG1pIGJglqYUDSchgshleLefthxgNvGOzyDO73mH34ueO83dr2w0BbamyicWmROZPMcHAOQ3KxwTEe45m9Z24nbzuTCNRyLC23AYcWCYb8A4d5GJgTNwC1MPC23U42OwDUAnQhbi38jxmAWurBWhj/tp1LNjv/kIAWiWSQlsNgLcy8bQfszG4QskXiMdAvBseLJY+lFTPLnklOMLsBtCUBn1/4k5k/vKmozuM7fHgz49sddvZm59MfPvhQY4NTCxjwGCDYiWCVCfiUg7Ugse0JKR4Fo2AUjIKRBwDZp2N5u7r90QAAAABJRU5ErkJggg==","orcid":"","institution":"Maulana Azad National Urdu University","correspondingAuthor":true,"prefix":"","firstName":"Muhammad","middleName":"Rafiq","lastName":"Abuturab","suffix":""}],"badges":[],"createdAt":"2026-02-26 21:38:42","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-8981611/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-8981611/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":104808479,"identity":"e8794dba-22bd-40ed-a862-fadfd5fa72a2","added_by":"auto","created_at":"2026-03-17 12:37:55","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":7643615,"visible":true,"origin":"","legend":"","description":"","filename":"Manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-8981611/v1_covered_19479e67-8e1a-4e5b-8db9-982fdb52b2cd.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Asymmetric multiparameter optical cryptosystem using spatial and hyperchaotic spiral phase encoding for multiple single-channel images","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"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":"scientific-reports","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"scirep","sideBox":"Learn more about [Scientific Reports](http://www.nature.com/srep/)","snPcode":"","submissionUrl":"","title":"Scientific Reports","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"stoa","reportingPortfolio":"Scientific Reports","inReviewEnabled":true,"inReviewRevisionsEnabled":true},"keywords":"","lastPublishedDoi":"10.21203/rs.3.rs-8981611/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-8981611/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eA novel optical cryptosystem that uses spatial and hyperchaotic spiral phase encoding for multiple single-channel images is proposed. For the first time to the author\u0026rsquo;s knowledge, hyperchaotic spiral phase mask (HSPM) has been introduced. In the encryption process, eight color images are decomposed individually into corresponding \u003cem\u003eR\u003c/em\u003e, \u003cem\u003eG\u003c/em\u003e, and \u003cem\u003eB\u003c/em\u003e channels. \u003cem\u003eR\u003c/em\u003e-\u003cem\u003eR\u003c/em\u003e channel, \u003cem\u003eG\u003c/em\u003e-\u003cem\u003eG\u003c/em\u003e channel, and \u003cem\u003eB\u003c/em\u003e-\u003cem\u003eB\u003c/em\u003e channel pairs of two images are spatially phase encoded into a single complex amplitude channel independently. The four channel pairs are transformed separately using an inverse discrete wavelet transform to generate the fused \u003cem\u003eR\u003c/em\u003e, \u003cem\u003eG\u003c/em\u003e, and \u003cem\u003eB\u003c/em\u003e channels. The sum of three fused channels and HSPM produces a complex image as input image. The complex image is modulated with HSPM and gyrator transformed. The amplitude and phase-truncation operations are executed to produce the first decryption key and first encrypted image. The procedure is repeated again to produce a second decryption key and final encrypted image. The parameters of HSPMs are exploited as encryption and decryption keys for multiple single-channel images. There are three main advantages to the proposed cryptosystem. The multiple parameters of HSPM are utilized as extremely sensitive decryption keys. Second, the multiple parameters of the first and second HSPMs are exploited as highly sensitive encryption keys. Finally, the proposed system circumvents problems caused by misalignment, which is an important issue in optical systems that require axial movements. A hybrid optoelectronic system can be exploited to implement the proposed system. 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