| 摘要: |
| 针对低维混沌序列加密语音信号保密性较差,而复合混沌序列加密信息又使得混沌系统难以用软硬件实现的问题,研究了一种基于参数辨识的超混沌时滞模型的加密算法.该算法引入了分块加密的思想,采用了一种映射的方法产生密钥,不仅实现简单,实用性强,而且有效地改善了由于计算机有限精度效应而产生的混沌周期行为,增强了保密性能. |
| 关键词: 语音信号处理 超混沌 时滞 随机性 密钥 混沌同步 |
| DOI：10.3969/j.issn.1001-893X. |
| Received:July 11, 2006Revised:October 28, 2006 |
| 基金项目: |
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| A Voice Encryption Algorithm Based on Hyperchaos Mackey-Glass System |
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| Abstract: |
| The secrecy capability usually decreases when using low dimensional chaotic sequence to encrypt signal, while system is not practical when using complicated composite chaotic sequence. Therefore, a new encryption algorithm is proposed, in which time -delay hyperchaos system based on parameter identification is adpoted, block data encryption is introduced, and a method of mapping to produce key word is applied. The system is simple and practical, and can effectively improve the chaos period behavior caused by disadvantage of limited precision and build up secure capability. |
| Key words: voice signal processing hyperchaos time - delay random privacy key chaos synchronization |
