臺灣博碩士論文加值系統

由於近年來網際網路的快速發展及數位資訊傳播的效率提升，進而衍生出許多嫖竊數位資訊版權之紛爭及盜取重要數位資訊之情事(諸如國家機密或商業機密等)。為有效解決此一問題，全球各政府相關部門及各資訊相關學系，均投注相當資源，致力於數位資訊加密技術之研究領域。因此，在未來網際網路的世界中，數位資訊加密技術亦將持續被重視著。
本文係運用全像光學技術中相位編碼參考光部分執行三維物件數位全像加/解密技術之研究，文內提及運用光學全像片編碼過程中之參考光的部分實施既定相位加密，並提議使其成為三維物件全像光學及數位全像加/解密之密鑰，該密鑰則可在初製過程可依照現有環境條件即時製作，而重建過程的條件亦十分嚴謹(幾乎須與原有環境條件相當)，因此本研究除能提昇保障二維影像資訊外，並期能運用全像光學之理念製作數位全像三維物件加/解密在網路傳輸上之安全性，更能降低密鑰被重製之可能，進而避免加密資料遭破解之餘。

Due to the Internet rapid development and digital information dissemination efficiency increased in recent years, many illegal cases happened, such as stealing copyrights of digital information and significant digital information (such as national secret or commercial secret and so on). To solve this problem effectively, the Government and information related department of various countries in the world all spend considerable resources and devote to the research of digital information security technology. Therefore, in the future Internet world, digital information encryption technology also will continue to be significantly emphasized.
In this thesis we propose a novel idea of the utilizing deterministic phase-encoded reference beam of holographic optics technology to implement two- and three-dimensional (2D and 3D) digital images encryption/ decryption. We also propose that we should make the reference beam become a key to encrypt and decrypt 2D/3D object. This key may be possible to be generated immediately at the beginning according to the existing environmental condition; the condition of reconstruction process is extremely rigorous (nearly have to equal to the original environmental condition). Therefore this research not only improves to protect the 2D image information but also is expected to utilize holographic optics ideals encrypting/ decrypting digital holographic 3D objects to ensure the security of transmission in the network. Furthermore, this research can reduce the possibility of copying the key then avoids decrypting the encrypted data.

誌謝……………………………………………………………………….i
摘要………………………………………………………………………ii
Abstract……………………………………………………………..iii
目錄………………………………………………………………………v
表錄…………………………………………………………………….viii
圖錄……………………………………………………………………...ix
第1章 緒論………………………………………………………………1
1.1 前言…………………………………………………………1
1.2 研究目的……………………………………………………2
1.3 研究流程……………………………………………………5
第2章 全像理論基礎與加/解密技術之相關研究………………….…. 8
2.1 繞射原理……………………………………………………8
2.2 全像光學原理……………………………...……………...13
2.3 數位全像..…………………………………………………19
2.4 全像光學應用於加/解密之技術………………………….24
2.4.1 加/解密理論………………………………………..24
2.4.2 傳統加/解密技術…………………………………..25
2.4.3 數位全像與加/解密技術之應用…………………..27
2.5 重建影像分析方式………………………………………28
第3章 數位全像之加/解密之系統架構……………………………..30
3.1 數位全像加/解密之實驗設計…………………………..30
3.1.1 Mach-Zehnder Interferometer基礎之數位全像加/解密系統…………………………………………32
3.1.2 實驗設備說明..…………………………………….33
3.2 二維影像數位全像加密光路設計………..………………36
3.3 三維物件數位全像加密光路設計………………………41
3.4 數位全像加/解密之演算實驗…………………………….44
3.4.1 二維影像加/解密之演算實驗………………..….45
3.4.2 三維物件加/解密之演算實驗…………………...50
第4章 實驗結果分析與討論…………………………………………..53
4.1 重建影像之分析與比較………………………………….53
4.2 討論與改進方案………………………………………….54
第5章 總結……………………………………………………………..59
5.1 結論………………………………………………………..59
5.2 未來發展方向……………………………………………..60
參考文獻………………………………………………………………..62
附錄……………………………………………………………………..65
自傳……………………………………………………………………68

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