Kong Dezhao, Shen Xueju, Xu Qinzu, Xin Wang, Guo Haiqiong
Department of Electronic and Optics, Shijiazhuang Mechanical Engineer College, Shijiazhuang, China.
Appl Opt. 2013 Apr 20;52(12):2619-25. doi: 10.1364/AO.52.002619.
A multiple-image encryption scheme based on cascaded fractional Fourier transform is proposed. In the scheme, images are successively coded into the amplitude and phase of the input by cascading stages, which ends up with an encrypted image and a series of keys. The scheme takes full advantage of multikeys and the cascaded relationships of all stages, and it not only realizes image encryption but also achieves higher safety and more diverse applications. So multiuser authentication and hierarchical encryption are achieved. Numerical simulation verifies the feasibility of the method and demonstrates the security of the scheme and decryption characteristics. Finally, flexibility and variability of the scheme in application are discussed, and the simple photoelectric mixed devices to realize the scheme are proposed.
提出了一种基于级联分数傅里叶变换的多图像加密方案。在该方案中，通过级联阶段将图像依次编码为输入的幅度和相位，最终得到加密图像和一系列密钥。该方案充分利用了多密钥以及所有阶段的级联关系，不仅实现了图像加密，还具有更高的安全性和更多样化的应用。因此实现了多用户认证和分层加密。数值模拟验证了该方法的可行性，证明了该方案的安全性和解密特性。最后，讨论了该方案在应用中的灵活性和可变性，并提出了实现该方案的简单光电混合装置。
