基于矢量分解和干涉原理的多图像加密

Multiple-image Encryption Based on Vector Decomposition and Interference

针对现有多图像加密的缺陷,提出了一种基于矢量分解和干涉原理的多图像加密技术.加密时,将多个待加密图像通过矢量分解分别编码为两个随机相位图像,其中一个随机相位图像是多个待加密图像共有的,并将其作为共有的密文,另一随机相位图像作为各自的密匙.解密时,利用光的干涉原理,通过共有的密文和各自密匙即可恢复出原图像.理论分析与计算机模拟结果表明,该方法不仅克服了存在于多图像加密系统中的交叉噪声问题,从而使加密图像数量不受限制,而且由于该方法中的密文和密匙都是随机相位图像,因此不存在待加密图像轮廓泄露问题.

Aiming at the disadvantages of the multiple-image encryption, a novel method for multiple-image encryption is proposed based on vector decomposition and interference. In the encryption process, the original images to be encoded are encoded into by using basic vector operations. One of the two random phase-only masks is used as the ciphertext for all original images and the other is served as the decryption key. In decryption process, the original images can be reconstructed with the ciphertext and the corresponding key based on interference. The theoretical analysis and computer simulation results show that the method not only overcomes the cross-talk, but also the ciphertext and the key are both the random phase-only mask, which do not lead to the problem of the outline leak.