Quick response code and interference-based optical asymmetric cryptosystem
Quick response code and interference-based optical asymmetric cryptosystem
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DOI：
10.1016/j.jisa.2019.01.004
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发表时间：
2019-04
期刊：
影响因子：
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通讯作者：
Avishek Kumar;N. Nishchal
中科院分区：
文献类型：
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作者：
Avishek Kumar;N. Nishchal
提出了一种基于快速响应码和菲涅耳域干涉的图像加密方案。由于编码频谱的幅度和相位截断操作，该框架本质上是不对称的。输入图像采用Arnold猫映射进行置乱，并划分为像素块。每个块被编码成快速响应代码，然后被多路复用以生成二进制矩阵。相位截断的二进制矩阵被编码成解析生成的两个相位掩模。在解密期间，仅相位掩模被重新组合以产生二进制矩阵，该二进制矩阵被分组为快速响应码并被解码为像素块。像素块被重新组合和解扰以恢复原始图像。数值仿真结果验证了该方法的有效性。
In this paper, a novel image encryption scheme based on quick response code and interference in Fresnel domain is proposed. The framework is asymmetric in nature due to amplitude- and phase-truncation operation of encoded spectrum. The input image is scrambled using Arnold cat map and divided into pixel blocks. Each block is encoded into a quick response code, which are then multiplexed to generate a binary matrix. The phase-truncated binary matrix is encoded into analytically generated two phase-only masks. During decryption the phase-only masks are recombined to yield the binary matrix, which is grouped into quick response codes and decoded into pixel blocks. The pixel blocks are recombined and descrambled to retrieve the original image. Numerical simulations have been carried out to demonstrate the effectiveness of the proposed method.