DES encryption algorithm is an important content in the field of information security, but it has a certain defect. In order to improve DESs security performance, a dynamic DES algorithm based on OCML discrete spatiotemporal chaos is proposed. The micro-disturb method was adopted to further improve pseudo-random feature of OCML. Simulation and analysis indicate that the proposed algorithm can obtain a more security performance.%DES加密算法是一种重要的加密算法,但其存在一定的缺陷,为弥补缺陷,在DES加密算法的基础上提出了一种基于OCML离散时空混沌的动态DES加密算法(DSCDDES)来提高DES的安全性能,为了克服计算机的有限精度的缺陷而采用微扰动技术来改善OCML的伪随机性.仿真和分析表明该算法具有比普通DES加密算法更高的安全性能.
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