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中文摘要：
针对低维映射安全性的弱点，提出一种混沌遮掩保密通信的改进方案．该方案利用分层的两级密钥管理体制，将加密用的混沌序列改为动态参数，在提高密文安全性能的同时，不降低加密速度和传输速度．论证表明，低维映射仍有很好的应用潜力．
英文摘要：
A improved secure communication method based on chaotic masking is proposed to overcome weakness of low dimensional chaotic map. In the scheme the chaotic time series with dynamic parameters for encryption based on hierarchical two-level key management is designed . The performance of the encryption speed and transmission speed is not lowered while the security of ciphertext is obtained. The results showed that low dimensional chaotic map has great potential of secure communication.
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