Based on high effective locations algorithm and error estimate, improvement of the public-key scheme based on Chebyshev maps proposed recently was presented and a key agreement protocol was given.

• 摘要基于高有效位的数字计算方法和误差估计方法，对目前已提出的基于切比雪夫映射的公钥加密方法进行了改进，得到一种密钥协商协议。