摘要
提出了一种基于Logistic映射的语音混沌加密方案,该方案选择参数μ、迭代初始值和初始迭代次数作为密钥,扩大了密钥空间,避免了Logistic映射所遇到的周期窗口问题和短周期问题。基于该方案,在ARM9开发板上,开发了包含语音采集、压缩、实时加/解密等功能的语音实时加密传输系统。测试结果表明,经压缩/解压、加密/解密后的语音波形与原始波形相比,失真小,加密后的语音波形分布均匀,方案可行。
A chaotic audio encryption method based on logistic map is proposed, which uses parameter μ, iterative initial value and initial iterative times as encryption keys, thus broadening the key space, and avoiding some problems such as periodic windows and short period in logistic map. Based on this, a real-time audio encryption and transmission system is developed on ARM9 board. The system involves audio signal collection, compression, encryption and transmission. Experiment results show that the encrypted audio waves distribute evenly, and after compressing, decompressing, encrypting and dencryption, the audio waves have fairly little distortion.
出处
《通信技术》
2010年第8期140-142,145,共4页
Communications Technology
基金
广东省自然科学基金项目(编号:9151009001000021)
