针对随机相位编码光学图像加密技术，简要回顾了它的国内外研究进展，并讨论了它的发展态势。-Research and progress of optical image encryption using random phase mask present research situation and development of image encryption using random phase mask at home and abroad are reviewed. At the sam

运用新的光学加密方法实现图像加密，光学图像加密的密钥空间大。(The new optical encryption method is used to encrypt the image, and the key space of optical image encryption is large.)