基于随机投影与改进min-max哈希的可撤销指纹模板保护方案

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关键词：生物特征；随机投影；min-max哈希；可撤销指纹模板

中图分类号：TP309.7 文献标志码：A 文章编号：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

随着互联网的应用与发展，人们对信息安全愈发重视，身份认证已成为保护个人隐私和数据安全的重要防线。（剩余20550字）