计算机工程 ›› 2009, Vol. 35 ›› Issue (11): 137-139.doi: 10.3969/j.issn.1000-3428.2009.11.046

• 安全技术 • 上一篇    下一篇

基于混沌级联的语音频域实时加密系统

金建国1,林 瑞1,张庆凌2,侯国强1,邸志刚1,贾春荣1   

  1. (1. 河北理工大学信息学院,唐山063009;2. 河北理工大学科研处,唐山063009)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2009-06-05 发布日期:2009-06-05

Real-time Encryption System for Audio Frequency Domain Based on Cascaded Chaos

JIN Jian-guo1, LIN Rui1, ZHANG Qing-ling2, HOU Guo-qiang1, DI Zhi-gang1, JIA Chun-rong1   

  1. (1. College of Information, Hebei Polytechnic University, Tangshan 063009; 2. Division of Research, Hebei Polytechnic University, Tangshan 063009)
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-06-05 Published:2009-06-05

摘要: 针对现有语音实时保密通信系统中系统空载密钥泄漏现象导致容易遭受基于自适应同步控制方法攻击的问题,采用混沌级联对语音频域进行实时加、解密。该方案实现零密钥泄漏,有效抵御了基于自适应同步控制方法的攻击。系统测试分析结果表明,该方案是有效、安全的,优于基于单组混沌系统对时域的加密方法。

关键词: 语音通信, 混沌, 傅里叶变换, 频域加密

Abstract: Aiming at the problem in real-time speech secure communication system, which is attacked by self-adaptive synchronization control method because of no-load condition key leakage, a new scheme adopting cascaded chaotic system to encrypt the audio’s frequency domain is proposed. The scheme can avoid key leakage, therefore attacks based on self-adaptive synchronization control method can be effectively resisted. The test and analysis results of system indicate that this scheme is more effective and safer than the encryption method in time domain based on single chaotic system.

Key words: speech communication, chaos, Fourier transform, frequency domain encryption

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