通用型语音加密器的研究与实现

发布时间：2018-04-26 05:29

  本文选题：语音加密 + 异步模数模　； 参考：《国防科学技术大学》2014年硕士论文

【摘要】：语音加密在现代通讯保密技术中有着非常重要的地位。党政军等机要部门或商业机构、民用领域等涉及到保密语音通信时,都要采用各种方法对语音进行加密。而在语音进入传输设备之前就对其进行加密的方法,在降低因通信线路被窃听而造成的秘密信息被第三方截收、窃听或篡改的危险性上,是非常有效的。论文以STM32芯片与TLV320AIC23芯片为核心构建硬件平台,针对通信终端,研究设计了一款在发送终端接收语音之前对语音进行加密的通用型加密器。论文从理论上阐明了该模块的工作原理和架构方式,并在大量的软、硬件工作基础上,实现且证明了该模块在语音加密处理上的有效性和可行性。论文的主要工作如下:1.论文介绍该模块的硬件平台,对硬件的体系设计思路和系统架构进行说明,细致的阐述了硬件平台的芯片和工作原理,其中包括芯片的各项参数、图表,与终端的连接方法等方面。2.针对模块的软件系统部分的研究工作进行详细的阐述,软件系统,在整个加密模块中起到驱动硬件平台的作用,在这一部分,论文主要分析了软件模块的各项作用和数据处理流程,调试工作所需的软、硬件,开发板的初始化部分和自检部分,以及语音信号的输入输出部分。3.语音处理部分,介绍了论文对采集到的语音信号的处理办法与步骤,提出了所涉及到的理论体系,设计分析实验,通过对实验结果的研究,说明采用这种理论体系的可行性,主要包括语音处理的原理,实现以及性能。4.密码算法部分,阐明所使用的数据加密算法与密钥加密算法的原理、数据处理流程,设计实验,对实验数据进行加解密操作,并分析密码模块的工作效果。主要内容包括分别构建针对数据和密钥的加密、解密密码体系,通过程序实现语音加解密的密码体系算法,以及测试加解密算法的性能及其对实验数据的效果。本文实现的语音加密器,具有良好的加密强度、解密音质;通用性强,可串接使用于任意明话语音通信终端之间。它不仅适用于机要部门的保密通信,同时,作为一种成本低廉,适用性强的语音加密方式,在民用方面也具有广阔的适用范围和市场前景。
[Abstract]:Voice encryption plays an important role in modern communication security technology. When confidential voice communication is involved in party, government, military and other important departments, commercial organizations and civil fields, all kinds of methods should be used to encrypt the voice. However, the method of encrypting the voice before entering the transmission equipment is very effective in reducing the risk of interception, eavesdropping or tampering of the secret information caused by the eavesdropping of the communication line. In this paper, a hardware platform based on STM32 chip and TLV320AIC23 chip is constructed. Aiming at the communication terminal, a general encryption device is designed to encrypt the voice before the transmitting terminal receives the voice. In this paper, the working principle and architecture of the module are explained theoretically, and the validity and feasibility of the module in speech encryption are proved based on a large number of hardware and software work. The main work of the thesis is as follows: 1: 1. This paper introduces the hardware platform of this module, explains the system design idea and system architecture of the hardware, and elaborates the chip and working principle of the hardware platform in detail, including the parameters of the chip, the chart and the diagram. Connection method with terminal, etc. The research work of the software system part of the module is described in detail. The software system plays the role of driving the hardware platform in the whole encryption module. In this part, This paper mainly analyzes the function of the software module and the data processing flow, the software and hardware needed for debugging, the initialization part and the self-checking part of the development board, and the input and output part. 3 of the speech signal. In the part of speech processing, the paper introduces the processing methods and steps of the collected speech signal, puts forward the theoretical system involved, designs and analyzes the experiment, and proves the feasibility of adopting this theory system through the research of the experimental results. Including the principle of speech processing, implementation and performance. 4. In the part of cipher algorithm, the principle of data encryption algorithm and key encryption algorithm, data processing flow, designing experiment, encrypting and decrypting experimental data, and analyzing the effect of cipher module are expounded. The main contents include constructing the encryption and decryption cryptosystem for the data and the key, realizing the algorithm of the speech encryption and decryption through the program, and testing the performance of the encryption and decryption algorithm and its effect on the experimental data. The speech encryption device realized in this paper has good encryption intensity and deciphering sound quality and can be used in serial connection between any open voice communication terminals. It is not only suitable for confidential communication of confidential departments, but also has a wide range of application and market prospect as a low cost and strong applicable voice encryption method.
【学位授予单位】：国防科学技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN918.4;TN912.3
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本文编号：1804704