研究生: |
鍾天雲 Tien-Yun Chung |
---|---|
論文名稱: |
使用DAES演算法進行影像加密暨傳輸之設計與實現 Design and Implementation of Image Encryption-Then-Transmission Using DAES Algorithm |
指導教授: |
楊振雄
Cheng-Hsiung Yang |
口試委員: |
郭永麟
Yong-Lin Kuo 陳金聖 Chin-Sheng Chen 吳常熙 Chang-Shi Wu |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 自動化及控制研究所 Graduate Institute of Automation and Control |
論文出版年: | 2018 |
畢業學年度: | 106 |
語文別: | 英文 |
論文頁數: | 93 |
中文關鍵詞: | 渾沌系統 、DNA 、像素打散 、圖片加密 、Wi-Fi 、FPGA |
外文關鍵詞: | Chaos System, DNA, Pixel Break-up, Image Encryption, Wi-Fi, FPGA |
相關次數: | 點閱:625 下載:0 |
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在本論文中,我們基於Altera FPGA DE2-115設計了一套結合四維渾沌及DNA編碼的改良型AES加密技術,並架設了Wi-Fi無線傳輸環境模擬驗證。
首先透過二維相圖、對稱性分析、平衡點分析、散度分析與Lyapunov指數圖,分析本文提出的新四維度渾沌系統,並將產生出來的渾沌訊號應用在新加密法中。
在加密法中,一共有四個特色,第一,明文圖片的資訊會影響隨機序列的變化; 第二,加密循環次數降低; 第三,渾沌序列結合DNA,會讓數據的取代更多變化;第四,我們採用四種運算來打亂圖片的像素質。
我們使用多張性質差異很大的圖片,使用MATLAB進行加密效果分析,在加密安全性分析中,我們使用了直方圖分析、相關性係數分析、熵值分析和差異性分析。從這些加密安全性分析的結果,可以看出我們所設計的加密演算法對於彩色圖片的加密效果非常好,適合用隱藏彩色圖片的訊息。
In this thesis, we based on Altera FPGA DE2-115 to design 4D chaotic and Modified DNA encoding. In addition, we set up Wi-Fi wireless environment simulation verification.
Firstly, through the 2D phase diagram, symmetry analysis, equilibrium analysis, divergence analysis and Lyapunov exponent graph to analyze 4D chaotic system, which produces chaotic signals, use in the new encryption method.
In the encryption method, there are four characteristics. First, the information of the plaintext image affects the random sequence. Second, reduced Round of encryption. Thirdly, DNA combined with the chaotic sequence will make substitution cipher more diversified. Fourth, we use four logic operations to disrupt the pixel quality of the image.
We use multiple different character pictures and use MATLAB for encryption analysis. In the analysis of encryption security, we use histogram analysis, correlation coefficient analysis, entropy analysis, and variance analysis. From the results of these cryptographic security analyses, it shows that the encryption algorithm we designed has a very good effect on the encryption of color pictures and is suitable for hiding messages of color images.
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