There is a method that presents for securing much information at the same time, which need not be restricted to a single image data. Based on ghost imaging, this paper proposes a new encryption algorithm: multi-image holographic encryption based on phase recovery algorithm and ghost imaging (PRA-GI). In the encryption process, first, multiple images are combined into one phase hologram image by phase holographic recovery algorithm. Second, the combined image is encrypted by ghost imaging to obtain ciphertext. During the decryption, each receiver can get the same phase hologram image reconstructed by the public key. Finally, each receiver uses the unique assisted private key to get corresponding information. By numerical simulation, it is found that this algorithm can effectively improve the encryption capacity. Experimental results and objective indicators verify the feasibility of this algorithm. At the same time, PRA-GI is suitable for enterprises and governments. For example, the leader license different assisted private keys and the primary public key to different employees according to different permissions. This algorithm implements double encryption, which ensures the security of information and solves crosstalk problems among images.

中文翻译：

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基于相位恢复算法和重影成像的多图像全息加密

有一种方法可以同时保护很多信息，而不必局限于单个图像数据。基于重影成像，本文提出了一种新的加密算法：基于相位恢复算法和重影成像的多图像全息加密（PRA-GI）。在加密过程中，首先通过相位全息恢复算法将多幅图像组合成一幅相位全息图像。其次，对组合图像进行重影加密，得到密文。在解密过程中，每个接收器都可以得到由公钥重建的相同相位的全息图像。最后，每个接收者使用唯一的辅助私钥来获取相应的信息。通过数值仿真，发现该算法能够有效提高加密能力。实验结果和客观指标验证了该算法的可行性。同时，PRA-GI适用于企业和政府。例如，领导者根据不同的权限将不同的辅助私钥和主公钥许可给不同的员工。该算法实现了双重加密，保证了信息的安全性，解决了图像之间的串扰问题。