VoIP系统中加密算法的应用研究  

Application Research of Encryption Algorithm in VoIP System

作　　者：吴金涛[1] 王宽仁[1] 徐云乾[1] 

机构地区：[1]空军工程大学信息与导航学院,陕西西安710077

出　　处：《电声技术》2013年第4期47-50,共4页Audio Engineering

摘　　要：针对目前语音信息加密不足的现状,在VoIP终端设备中设计并实现了基于FPGA的AES算法的加解密模块。首先介绍了具有加解密能力的VoIP系统的总体实现结构;其次重点介绍了加密算法各个子模块的实现方法,并通过硬件描述语言在FPGA芯片内部加以实现;最后,通过编写Testbench文件对PCI的部分功能和加解密进行了仿真测试。仿真结果表明,该系统成功实现了数据传输接口和语音的快速加解密功能,为数据的快速安全实时传输提供了可靠保证。加解密算法的实现占用的FPGA资源少,速度快,吞吐率高,性能稳定。Aiming at the status that voice information encryption is inadequated, the AES algorithm encryption＆decryption module based on FPGA in the VolP terminal equipment is designed and implemented. Firstly, the overall realization struc- ture of VoIP system which has the encryption ability is introduced. Then, the method of each sub - module of the encryption algorithm is introduced, and it is achieved in FPGA chip through HDL. Finally, encryption＆decryption process is simulated by writing Testbench file. The results show that this system can successfully implement voice quickly encrypting and decryp- ting,which provides a reliable guarantee for real - time, quickly, securely transmission. Encryption＆decryption algorithm owns a quick, stable performance, high throughput rate, and uses less of FPGA resource.

关 键 词：语音加密 网络语音电话 安全传输 

分 类 号：TN912[电子电信—通信与信息系统]