中文摘要：

本文提出了以位相抽取为基础的三维信息加密算法.构造由纯振幅和纯位相物体组成的简单三维信息作为加密对象.先用标量衍射理论计算其复振幅并抽取相位分布,再结合双随机位相编码完成加密.解密算法为上述算法的逆过程.计算机模拟结果证实了该算法的有效性、鲁棒性和安全性,并揭示了位相抽取算法用于加密更大信息量三维信息的潜力.

英文摘要：

The algorithm for three-dimensional information encryption based on the phase extraction is proposed. The three-dimensional information with the pure amplitude and pure phase are constructed as the encryption target. First,the complex amplitude of the three-dimensional information is calculated under the scalar diffraction theory. Then its phase distribution is extracted independently and it is encrypted with the double random phase encoding. The decryption algorithm is just the inverse process as the above. Computer simulations demonstrate the feasibility,the robustness and the security of the algorithm. Further,it is revealed the potential of applying the algorithm for the three-dimensional information encryption with much larger information quantity.