自動修改密碼具權限設定之鎖具與鑰匙系統

本論文研製一自動修改密碼且具權限設定之鎖具及鑰匙系統。自行設計的一種新的傳輸協定，鑰匙與鎖具的溝通方式只需一條資料傳輸線，其規定本系統的鑰匙和鎖具互相溝通方式。本系統的資料傳輸方式使用數位資料傳輸方式與類比傳輸模式兩種模式，數位傳輸與類比傳輸隨機使用，並且其資料傳輸頻率並非固定，每一筆資料傳輸頻率會不同，並且下一次的開鎖不使用相同的傳輸格式。在這兩種傳輸協定加密下，很難對資料進行解析破解，無法讀取正確資料內容。在完成開鎖後，鎖具與鑰匙會進行密碼更新步驟，下次開鎖時密碼會改變。本作品使用微處理器當作鎖具和鑰匙的運算核心。鑰匙由一個數位轉類比電路和微處理器組成，因此鑰匙的體積以及重量是十分輕巧的。本作品的鑰匙可以對多個鎖具使用，只需要將該鑰匙副與開鎖權限，使用多個鎖具不需要多攜帶許多鑰匙，降低外出時的負擔。每一組鎖具皆有一把母鑰匙設定開鎖權限，可隨時增加或刪除開鎖鑰匙方便管理。本作品使用基本電路元件組成較低的成本，與一般電子鎖具相比具有管理的方便性與較好的保密性。

關鍵字

晶片鎖；電子鎖

並列摘要

This thesis presents a lock and key system that can changes the password automatically, and support the setting of authority in access. We design a new protocol that defines the transmission protocol used in this system. The lock and key use one data line for data transmission. In terms of data link, this system uses digital transmission and analog transmission randomly during communication. Besides, the data transmission frequency is not fixed in this system. It is noted that the transmission frequency will be changed at next time. So the strategy can increase the security of the password. After checking the password is correct, lock and key will change the passwords at the same time, so next time the password will be changed. This work uses microchips as the core of the lock and key. Only one digital to analog circuit and one microchip are included in the key circuit, so it is small and light. The key can open many locks in the proposed system. We can use one key to open many locks if it has authority to open the door. Every lock has only one key for setting other key to get or cancel the authority of unlocking this door. The administration of this door is easy and convenient. This work uses a basic electronic circuit to build, so the cost of this framework is cheap, and it has better security and convenience than some other electronic locks.