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研究生:林志豪
研究生(外文):Chih-Hao Lin
論文名稱:AES編解碼演算法於無線門禁系統之設計與實作
論文名稱(外文):Design and Implementation of tne AES Algorithm for Wireless Access Control Systems
指導教授:陳文輝陳文輝引用關係
指導教授(外文):Wen-Hui Chen
口試委員:楊文治范丙林俞齊山
口試委員(外文):Wen -Chih YangPing-Lin FanChi-Shan Yu
口試日期:2012-06-29
學位類別:碩士
校院名稱:國立臺北科技大學
系所名稱:自動化科技研究所
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2012
畢業學年度:100
語文別:中文
論文頁數:61
中文關鍵詞:高等加解密演算法射頻收發器數位無線系統無線門禁系統
外文關鍵詞:Advanced Encryption StandardRadio Frequency (RF) TransceiverDigital Wireless SystemWireless Access Control System
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無線射頻辨識系統應用相當廣泛,包括門禁卡、悠遊卡及電子錢包等,本研究使用主動式RFID,手持設備和家用讀取設備皆為雙向系統,不需像被動式門禁卡需貼近讀取器動作,系統低頻部份使用125kHz電磁感應,不易被水或金屬物干擾,不需刻意將手持設備拿在手中,放入公事包或口袋即可自動感應,而微波使用 2.4 GHz傳輸密碼格式。在傳輸操作模式中,系統接收端干擾和雜訊是無可必免的,如何使系統具備抗干擾和抗雜音的能力,是系統韌體寫法需考慮的,RFID密碼系統強度不足,容易被破解導致損失財物,本研究搭配微控制器編寫高等加密標準編解碼演算法實現密碼傳輸,與低頻特殊編解碼架構實現硬體設計,以達到無線系統密碼之高強度與安全性。本研究使用三軸電感與高接收靈敏度之低頻晶片增加感應距離,並以特殊編解碼解決了多張RFID卡無無法在同一時間感應的問題。為增強系統保密性,本研究採用AES演算法實作感應與搖控分別可達1公尺及8公尺距離之高強度無線門禁系統。

Radio frequency identification (RFID) system is applied extensively, including in access control cards, EasyCard and E-wallet. This study adopts active RFID. The hand-held unit and in-home unit are two-way systems and do not require close-up readings as the passive access control card. For the low frequency part, 125 kHz electromagnetic induction is used, which is not subject to disturbance by water or metals and can sense automatically in a briefcase or pocket without holding the equipment. 2.4GHz code transfer format is applied for microwave. In the transfer operation mode, interference and static in the system’s receiving-end are inevitable, thus how to allow the system to be with the capabilities of anti-interference and anti-static must be considered in the system firmware writing. The RFID code system is with insufficient intensity and subject to be deciphered, which may lead to financial and property losses. This study uses micro controller in realization of code transfer by writing advanced encryption standard (AES) encoding and decoding algorithm, and realization of hardware design by low frequency encoding and decoding framework, to achieve high intensity and security of wireless code system. This study uses three-axis inductance and high sensitivity low-frequency control chip to increase the access distance with specific codec approach to resolve the problem resulting from using multiple RFID cards simultaneously. With hardware implementation of the AES algorithm, the security of the wireless access system can be strengthened. Experimental results showed that the access distance can be reach at the 1 m and 8 m with induce and remote control, respectively.

中文摘要...........................i
英文摘要...........................ii
誌謝...............................iv
目錄...............................v
表目錄.............................vii
圖目錄.............................viii
第一章 緒論........................1
1.1 研究動機與方法.................1
1.2 問題描述與解決方法.............2
1.3 各種加解密相關文獻回顧.........4
1.4 論文架構.......................5
第二章 編碼基本架構................6
2.1 GF()與XTIME()數學運算..........6
2.2 AES編碼與特殊編碼架構..........8
2.3特殊編解碼與系統設計............13
2.4 AES演算法之編寫................18
第三章 通訊系統介紹................21
3.1數位調變簡介....................21
3.2接收機架構與匹配方式............25
第四章 硬體電路架構................29
4.1微控制器與低頻發射之設計........30
4.2低頻接收器與匹配介紹............33
4.3高頻接收器簡介..................35
4.4硬體線路規劃....................37
第五章 天線模擬與實測..............40
5.1微波天線模擬....................40
5.2微波天線實測....................47
第六章 實驗結果....................52
6.1微波、低頻訊號之發射與接收......52
6.3電路溫度特性....................54
6.4 AES編解碼結果..................57
第七章 結論........................59
參考文獻...........................60



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