發(fā)布時間：2018-04-26 05:29

  本文選題：語音加密 + 異步模數(shù)模�。� 參考：《國防科學(xué)技術(shù)大學(xué)》2014年碩士論文

【摘要】：語音加密在現(xiàn)代通訊保密技術(shù)中有著非常重要的地位。黨政軍等機(jī)要部門或商業(yè)機(jī)構(gòu)、民用領(lǐng)域等涉及到保密語音通信時,都要采用各種方法對語音進(jìn)行加密。而在語音進(jìn)入傳輸設(shè)備之前就對其進(jìn)行加密的方法,在降低因通信線路被竊聽而造成的秘密信息被第三方截收、竊聽或篡改的危險性上,是非常有效的。論文以STM32芯片與TLV320AIC23芯片為核心構(gòu)建硬件平臺,針對通信終端,研究設(shè)計了一款在發(fā)送終端接收語音之前對語音進(jìn)行加密的通用型加密器。論文從理論上闡明了該模塊的工作原理和架構(gòu)方式,并在大量的軟、硬件工作基礎(chǔ)上,實現(xiàn)且證明了該模塊在語音加密處理上的有效性和可行性。論文的主要工作如下:1.論文介紹該模塊的硬件平臺,對硬件的體系設(shè)計思路和系統(tǒng)架構(gòu)進(jìn)行說明,細(xì)致的闡述了硬件平臺的芯片和工作原理,其中包括芯片的各項參數(shù)、圖表,與終端的連接方法等方面。2.針對模塊的軟件系統(tǒng)部分的研究工作進(jìn)行詳細(xì)的闡述,軟件系統(tǒng),在整個加密模塊中起到驅(qū)動硬件平臺的作用,在這一部分,論文主要分析了軟件模塊的各項作用和數(shù)據(jù)處理流程,調(diào)試工作所需的軟、硬件,開發(fā)板的初始化部分和自檢部分,以及語音信號的輸入輸出部分。3.語音處理部分,介紹了論文對采集到的語音信號的處理辦法與步驟,提出了所涉及到的理論體系,設(shè)計分析實驗,通過對實驗結(jié)果的研究,說明采用這種理論體系的可行性,主要包括語音處理的原理,實現(xiàn)以及性能。4.密碼算法部分,闡明所使用的數(shù)據(jù)加密算法與密鑰加密算法的原理、數(shù)據(jù)處理流程,設(shè)計實驗,對實驗數(shù)據(jù)進(jìn)行加解密操作,并分析密碼模塊的工作效果。主要內(nèi)容包括分別構(gòu)建針對數(shù)據(jù)和密鑰的加密、解密密碼體系,通過程序?qū)崿F(xiàn)語音加解密的密碼體系算法,以及測試加解密算法的性能及其對實驗數(shù)據(jù)的效果。本文實現(xiàn)的語音加密器,具有良好的加密強(qiáng)度、解密音質(zhì);通用性強(qiáng),可串接使用于任意明話語音通信終端之間。它不僅適用于機(jī)要部門的保密通信,同時,作為一種成本低廉,適用性強(qiáng)的語音加密方式,在民用方面也具有廣闊的適用范圍和市場前景。
[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.
【學(xué)位授予單位】：國防科學(xué)技術(shù)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN918.4;TN912.3
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本文編號：1804704