提出了一种基于计算全息和随机相位编码的三维信息的加密与显示方案，在计算全息三维显示系统中，将随机相位掩模放置到计算全息的频谱信息中，重现时放置相应随机相位的共轭，并将此作为解密的密钥，实现对计算全息图中三维物体的解密和显示。该方案光路结构简单，在实现对三维物体显示的同时保证了信息的安全性，提高了加密的效率和信息的容量，数值模拟验证了方案的可行性。

A scheme of three-dimensional (3D) object encryption and display based on computer generated hologram (CGH) and random phase is presented. In the scheme, according to the reconstruction system of three-dimensional objects, the random phase masks (RPMs) are embedded into spectral information of CGH, then the encrypted CGH (En-CGH) is obtained. When the En-CGH is decrypted, the conjugate random phases as the keys are placed in the right position, and the decryption and reconstruction of three-dimensional objects are realized. The system structure of this scheme is simple. The introduction of RPM improves the security of reconstruction system. The efficiency of the encryption and the capacity of information storage are both improved. The numerical simulation verifies the feasibility of the scheme.