The double random phase real-value encryption and decryption method is proposed for the optical image security system.

提出了一种基于双随机相位的图像实值编码方法，该方法可应用于光学图像加密。

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In view of the importance of information and network security, a method of Chinese information encryption, BMP image and text hiding and the decryption is put forward.

针对信息与网络安全的重要性及严峻性，提出了一种汉字信息加密、在BMP图像文件中隐藏、恢复及解密的方法。

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Moreover, image encryption and decryption can be achieved at high speed optically or digitally.

此外，图像的加密和解密可以快速得用光学方法或用数字方法实现。

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