基于混沌与计算全息的光学加密技术

Besides having an inherent capability for high speed and parallel processing, the optical information security systems also can provide a great degree of freedom to hide the information. So exploring and finding new proposal of encryption and decryption based on the optical information processing technology has become an very important research fields at home and abroad in recent years. Depending on the techniques of computer generated hologram(CGH) and chaos for optical image encryption and decryption, this project will prepare for carrying out the study on the application of optical information security as the following several aspects: (1) various encryption methods with CGH, such as the CGH of Fresnel transform, CGH of Fourier transform, rainbow hologram with CGH, CGH of fractional Fourier transform, CGH of (fractional) wavelet transform and CGH of Gyrator transform, (2) the encryption and decryption methods of color hologram with CGH, (3) the encryption and decryption methods of dynamic hologram with CGH, (4) the safety performance analysis of various CGH encryption systems. The optical encryption security theory will be further enriched, improved and developed by the research results of this project; meanwhile, the project will promote the development of the technology of optical information security.

由于光学信息安全系统具有高并行度和高加密维度等优点，因此，探索基于光学信息处理技术的数据加密、解密方案成为近年来国内外活跃开展的一个重要研究领域。本项目拟围绕计算全息和混沌的加密解密光学技术，在光学信息安全的应用中开展如下几个方面的研究：（1）各种计算全息的加密，如菲涅耳计算全息、傅里叶变换计算全息、彩虹计算全息、分数傅里叶变换计算全息、（分数）小波变换计算全息和Gyrator变换计算全息等的加密与解密。（2）彩色计算全息的加密与解密。（3）动态计算全息的加密与解密。（4）各种计算全息加解密系统的安全性分析。本项目的研究成果将进一步丰富、完善和发展光学加密安全理论，推动光学信息安全技术的发展。

由于光学信息安全系统具有高并行度和高加密维度等优点，因此，探索基于光学信息处理技术的数据加密、解密方案成为近年来国内外活跃开展的一个重要研究领域。本项目围绕计算全息、数字全息和混沌的加密解密光学技术，在光学信息安全的应用中开展如下几个方面的研究：（1）针对黑白图像获得了计算全息、数字全息结合傅里叶变换、分数傅里叶变换、菲涅尔变换等多种加密系统优化方案。（2）针对彩色图像获得了计算全息、数字全息的加密与解密系统。（3）针对三维物体获得了计算全息、数字全息的加密与解密方案。（4）对各种加解密系统的安全性进行了详细的分析。研究结果表明具有以下优点：（1）加密信息是数字化的，便于存储于传输。（2）加密维度多，参数设置灵活，系统安全性高。（3）混沌技术和压缩感知技术可以有效降低信息量，便于传输。本项目的研究成果将进一步丰富、完善和发展光学加密安全理论，推动光学信息安全技术的发展。