Triple-image encryption based on phase-truncated Fresnel transform and basic vector operation.
Triple-image encryption based on phase-truncated Fresnel transform and basic vector operation.
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DOI：
10.1364/ao.54.008485
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发表时间：
2015-10
期刊：
影响因子：
1.9
通讯作者：
Xuemei Pan;Xiangfeng Meng;Xiulun Yang;Yurong Wang;Xiang Peng;W. He;G. Dong;Hongyi Chen
中科院分区：
文献类型：
--
作者：
Xuemei Pan;Xiangfeng Meng;Xiulun Yang;Yurong Wang;Xiang Peng;W. He;G. Dong;Hongyi Chen
提出了一种基于相位截断菲涅耳变换(PTFT)、基本矢量合成和异或运算的三重图像加密方法。在加密过程中，通过对第一和第二明文图像进行基本向量分解运算生成两个随机的相位掩模，每个掩模放置在输入平面和变换平面上，然后对第三个明文图像进行异或编码，得到输入平面上的加密图像。当密码系统被轴上平面照明时，在PTFT的辅助下，加密后的图像最终在输出平面上被加密成仅具有幅度的类噪声图像。在解密过程中，拥有正确的私钥、解密密钥和辅助几何参数密钥，并将它们放置在相应的正确位置，即可通过逆PTFT、基本矢量合成和异或译码成功解密原始三幅明文图像。理论分析和数值仿真均验证了该方法的可行性。
A triple-image encryption method is proposed that is based on phase-truncated Fresnel transform (PTFT), basic vector composition, and XOR operation. In the encryption process, two random phase masks, with one each placed at the input plane and the transform plane, are generated by basic vector resolution operations over the first and the second plaintext images, and then a ciphered image in the input plane is fabricated by XOR encoding for the third plaintext image. When the cryptosystem is illuminated by an on-axis plane, assisted by PTFT, the ciphered image is finally encrypted into an amplitude-only noise-like image in the output plane. During decryption, possessing the correct private key, decryption keys, and the assistant geometrical parameter keys, and placing them at the corresponding correct positions, the original three plaintext images can be successfully decrypted by inverse PTFT, basic vector composition, and XOR decoding. Theoretical analysis and numerical simulations both verify the feasibility of the proposed method.