基于隨機(jī)投影與改進(jìn)min-max哈希的可撤銷指紋模板保護(hù)方案

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關(guān)鍵詞：生物特征；隨機(jī)投影；min-max哈希；可撤銷指紋模板

中圖分類號：TP309.7 文獻(xiàn)標(biāo)志碼：A 文章編號：1001-3695（2025）07-036-2191-08

doi：10. 19734/j. issn. 1001-3695.2024.08.0375

Abstract：Withthewidespreadapplicationiometricunprotectedbiometrictemplates isstillatriskserioussecurityand privacybreaches.Existingbiometric templateprotectionschemesdestroythestructuretheoriginalbiometrictosatisfyirreversibility，reducetherecognitionaccuracybometrictemplates，ndtenfacechalenges inbalancingaccuracyandsurity.Therefore，this paper proposeda cancelable fingerprint template protectionscheme basedonrandom projection with improvedmin-maxhash it toaleviatethebalanceproblemacuracyandsecuritywhileachieving fingerprinttemplaterevocability.FirstlyitusedtheGaussanndomprojectionmatrixtoandomlyprojecttheigimensionaloigialfingerpintfeatures intolow-dimensionalspacetomaintainthedistancesimilaritybetweenthelow-dimensionalfeaturesandtheoriginalfingerprint features.Then，itimprovedthe min-max hashalgorithmbyusing the minimum index，subminimum index，sub-maximumindex， and maximumindex the projectedlow-dimensionalfeatures asthe hashcode.Thisimprovement allviated thereducedrecognitionaccuracycausedbythedeviation the minimumand maximum indexes inthe min-max hashing algorithm while enhancingtheeficencygeneratingfingerprinttemplates.Finalyitproposedacros-matchingmethodbasedonJaccardiilaity toincreasethecolisionprobabilitybetweehashcodes，furtherimprovingtherecognitionaccuracyfingerprinttemplates.Experimentalresultsandanalysesshowthatthisschemeimprovestherecognitionaccuracyandgeneration eficiencyfngerprint templates whileresistingsecurityandprivacyatacks.Thisapproachdemonstrateshighuniversalityfortheprotectionbiometrictemplatessuch as fingerprintsand faces.

KeyWords：biometric；random projection；min-max hash；cancelable fingerprint template

0引言

隨著互聯(lián)網(wǎng)的應(yīng)用與發(fā)展，人們對信息安全愈發(fā)重視，身份認(rèn)證已成為保護(hù)個人隱私和數(shù)據(jù)安全的重要防線。（剩余20550字）