Rajput Sudheesh K, Nishchal Naveen K
J Opt Soc Am A Opt Image Sci Vis. 2014 Jun 1;31(6):1233-8. doi: 10.1364/JOSAA.31.001233.
We propose a novel optical information encryption and authentication scheme that uses asymmetric keys generated by the phase-truncation approach and the phase-retrieval algorithm. Multiple images bonded with random phase masks are Fourier transformed, and obtained spectra are amplitude- and phase-truncated. The phase-truncated spectra are encoded into a single random intensity image using the phase-retrieval algorithm. Unlike most of the authentication schemes, in this study, only one encrypted reference image is required for verification of multiple secured images. The conventional double random phase encoding and correlation techniques are employed for authentication verification. Computer simulation results and theoretical explanation prove the effectiveness of the proposed scheme.
我们提出了一种新颖的光学信息加密和认证方案，该方案使用通过相位截断方法和相位恢复算法生成的非对称密钥。将与随机相位掩模结合的多幅图像进行傅里叶变换，并对得到的频谱进行幅度和相位截断。使用相位恢复算法将相位截断后的频谱编码到单个随机强度图像中。与大多数认证方案不同，在本研究中，验证多个安全图像只需要一幅加密参考图像。采用传统的双随机相位编码和相关技术进行认证验证。计算机模拟结果和理论解释证明了所提方案的有效性。
