有限精度问题降低了混沌映射序列的密码学和统计特性,且对那些与Tent映射拓扑共轭的映射产生的序列更可通过预测的方法精确重建。本文讨论了混沌映射的拓扑共轭变换及其性质,导出了Tent、Logistic和二阶Chebyshev映射的共轭关系,并针对这种攻击提出了一种混沌序列的产生方法可有效地抵抗这种攻击。 Finite accuracy problems reduce the cryptographic and statistical properties of chaotic map sequences, and the resulting sequences for those maps that are conjugate to the Tent map topology can be more accurately reconstructed by predictive methods. In this paper, we discuss the topological conjugate transform of chaos mapping and its properties, and derive the conjugate relations of Tent, Logistic and second-order Chebyshev mappings. We propose a chaotic sequence generation method that can effectively resist this attack .