信息安全中的光学加密技术

光学加密技术作为一种新的加密手段,近年来得到了快速发展,成为现代加密技术的重要研究内容之一.简要概括光学加密技术的产生和发展过程.就影响较大的几种光学加密技术,如双随机相位编码方法、基于分数傅里叶变换的加密方法、基于菲涅耳变换的加密方法、基于联合变换相关器的加密系统、利用离轴数字全息的加密系统和利用相移干涉技术的加密系统以及基于相位恢复算法的加密技术等作了分类评述和讨论.介绍各种加密方案的技术特点和实现方法,讨论实际应用中尚存在的问题,并对其应用前景作了进一步阐述.

Optical Encryption for Information Security

As a newly developed approach, optical encryption technology is progressing rapidly in recent years. It is an important supplement and promotion to traditional encryption techniques. Several major developments of optical encryption techniques are summarized, including the double random phase encoding technique, encryption techniques based on fractional Fourier transform, Fresnel transform, and joint transform correlator systems, utilizing digital holography or phase-shifting interferometry, and techniques based on phase retrieval algorithms. Character and realization of each encryption method are introduced, existing problems in use are discussed, and prospects are predicted.