基於低功耗藍牙之群組證明

群組證明是證明複數RFID標籤存在於相同時間區段，證明結果可作為證據或是再確認等用途，因此，證明結果的正確性及安全性顯得格外重要。經過多年的研究及改進，目前群組證明可抵抗絕大部分重送攻擊等問題。群組證明發展至今已相當完善，不論是其正確性、安全性以及應用領域，過去群組證明的系統環境皆架構於RFID系統上，因為 RFID 的讀取距離非常短，即證明此一群標籤存在於相同區域中，但RFID讀取器於生活中無法隨手可得。為此，本文提出基於低功耗藍牙之群組證明的方法。使用藍牙低功耗系統取代RFID系統，藍牙低功耗與RFID同為短距離通訊，亦可證明一群藍牙低功耗裝置存在於相同區域中。目前新一代智慧型裝置皆搭載藍牙低功耗的技術，而智慧型裝置於生活中的擁有者遠大於RFID讀取器的擁有者，因此，可以解決RFID讀取器使用者不普及的問題。我們提出基於低功耗藍牙之群組證明的方法，其中參與角色包含驗證伺服器、讀取器、使用者和參考節點等四種角色。使用者當中隨意一位使用者可作為發起者的角色，發起者使用持有的智慧型裝置向驗證伺服器發起群組證明，驗證伺服器接收請求後，告知讀取器先向指定參考節點取得可信任位置資訊。參考節點回傳位置訊息給讀取器，讀取器接著發起廣播訊息，在訊號範圍內的使用者接收訊息後，回傳證明片段給讀取器，讀取器收集特定群組的群組證明片段，產生最終群組證明結果，將結果回傳驗證伺服器驗證證明結果的正確性。在證明片段的產生過程中，我們使用藍牙低功耗廣告宣傳模式傳送訊息，因為藍牙低功耗廣告宣傳封包在無指向可連接模式和無指向不可連接模式中最多可攜帶31位元組長度的訊息，因此我們利用這段負載攜帶證明片段的等訊息，且提出一套解決訊息長度超過此長度負載限制時的問題。相較於現有群組證明，我們的方法一樣可抵抗重送攻擊等問題，而隨著物聯網的快速發展，智慧型裝置逐漸成為人與物之間最為常見的溝通橋梁，我們將架構於RFID系統的群組證明移置可使用智慧型裝置運行的藍牙低功耗系統上，通過此通訊媒介的改變便更能增加群組證明於生活中的普及性和可行性。因此，我們論文將會比其它研究更能運行於日常生活當中。

關鍵字

藍牙低功耗協定；群組證明；重送攻擊

並列摘要

Grouping proof is to prove that the complex radio frequency identification (RFID) tag in the same time zone present in the same area. The results as evidence to prove or revalidation purposes. Therefore, the results prove correctness and security is very important. After years of research and improvement, the grouping proof can against replay attack issue. The development of grouping proof has been quite perfect. Regardless of its correctness, security, and applications. In the past the grouping proof are based on RFID system. Because RFID signal range is very short, which proves that a group of tags present in the same area. But RFID reader can’t easily get in life. In this respect. In this paper, we propose a method that a grouping proof protocol based on Bluetooth low energy to replace RFID systems by Bluetooth Low Energy. Bluetooth low energy are also belong short-distance communications, which can also prove a group of Bluetooth low energy device present in the same area. The new generation of smart devices are equipped with Bluetooth low energy protocol. The owner of Smart devices is more than the owner of the RFID reader until this moment. So, it can solve the problem which the RFID reader aren't universal. Among our protocol, except the advantages of the existing grouping proof. And when mixed with other users in the case we can also produce proof. Finally, our protocol also can against replay.

並列關鍵字

Bluetooth low energy ； Grouping proof ； Replay attack

參考文獻

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基於低功耗藍牙之群組證明

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