In this paper, we propose an optical multimodal biometric encryption technique which uses digital holography (DH) for multiple biometric recording and successive optical encryption methods, by means of keys generated from biometric data. Physiological biometrics, such as fingerprints or iris scans, along with behavioral biometrics such as voice, are recorded simultaneously as multimodal biometrics, using multi-parameter off-axis DH. Moreover, multiple biometrics embedded in the same holograms are encrypted using the Fresnel domain double random phase encoding method, in which keys are generated from biometric data via a phase retrieval algorithm. By employing the decryption procedure for this encoding method, along with the correct keys and reconstruction parameters of DH, the original multimodal biometrics can be successfully retrieved . The proposed method provides multimodal biometrics with a higher level of security by availing itself of the advantages of optical techniques....

中文翻译：

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使用数字全息术的光学多模式生物特征加密

在本文中，我们提出了一种光学多模式生物特征加密技术，该技术利用数字全息术（DH）进行多种生物特征记录，并通过从生物特征数据中生成的密钥来进行连续的光学加密方法。使用多参数离轴DH同时将诸如指纹或虹膜扫描等生理生物特征以及诸如语音之类的行为生物特征记录为多峰生物特征。此外，使用菲涅耳域双随机相位编码方法对嵌入在相同全息图中的多个生物特征进行加密，其中通过相位检索算法从生物特征数据生成密钥。通过采用该编码方法的解密程序，以及DH的正确密钥和重建参数，可以成功检索原始的多峰生物特征。