Yang Bing, Liu Zhengjun, Wang Bo, Zhang Yan, Liu Shutian
Department of Physics, Harbin Institute of Technology, Harbin 150001 China.
Opt Express. 2011 Jan 31;19(3):2634-42. doi: 10.1364/OE.19.002634.
A novel optical image encryption scheme based on interference is proposed. The original image is digitally encoded into one phase-only mask by employing an improved Gerchberg-Saxton phase retrieval algorithm together with another predefined random phase mask which serves as the encryption key. The decryption process can be implemented optically based on Michelson interferometer by using the same key. The scheme can be regarded as a stream-cipher-like encryption system, the encryption and decryption keys are the same, however the operations are different. The position coordinates and light wavelength can also be used as additional keys during the decryption. Numerical simulations have demonstrated the validity and robustness of the proposed method.
提出了一种基于干涉的新型光学图像加密方案。通过采用改进的格尔奇贝格 - 萨克斯顿相位恢复算法，将原始图像数字编码为一个纯相位掩模，并结合另一个预定义的随机相位掩模作为加密密钥。解密过程可基于迈克尔逊干涉仪，使用相同密钥以光学方式实现。该方案可被视为一种类似流密码的加密系统，加密和解密密钥相同，但操作不同。在解密过程中，位置坐标和光波长也可作为附加密钥。数值模拟证明了该方法的有效性和鲁棒性。
