在6G 環境下，車聯網（V2X）成為智慧交通系統的重要組成部 分，依賴高效的數據傳輸和處理來確保車輛與車輛及基礎設施的即 時通信。傳統的DNS 系統因IP 地址更新延遲問題，在V2X 快速移動 環境，會頻繁更新IP 位址，DNS 本身預設更新條件為24 小時，故 DNS 有一定限制存在，Dynamic DNS（DDNS）技術可以用來解決此類 更新IP 地址效率問題。然而，DDNS 依賴單一服務商，面臨服務中 斷和安全性風險。未來成熟的6G 環境下，物聯網設備激增，使傳統 DNS 會面臨到嚴重的DDoS 攻擊。為了提升安全性與可靠性，本研究 提出一種基於可修改式區塊鏈的分散式DDNS 更新系統，並採用 Bloom Filter 技術加速區塊鏈上的DNS 查詢。該系統可有效抵禦 DDoS 攻擊、DNS 欺騙攻擊等常見威脅，並利用變色龍雜湊及雜湊鏈 技術保障DNS 記錄非法竄改的安全性與設備行蹤隱私性，提高整體 V2X 通信系統的穩定性。;In a 6G environment, Vehicle-to-Everything (V2X) plays a crucial role in smart transportation systems, enabling seamless and real-time communication between vehicles by leveraging advanced data transmission and processing capabilities. Traditional DNS systems face delays in updating IP addresses, which becomes problematic in the fast-moving V2X environment, where frequent IP address updates are required. With DNS typically set to update every 24 hours, this introduces inherent limitations. Dynamic DNS (DDNS) technology can resolve these issues by providing more efficient and timely IP address updates. However, DDNS is dependent on a single service provider, exposing it to potential service disruptions and security vulnerabilities. As the number of IoT devices grows in a fully developed 6G environment, traditional DNS will be increasingly vulnerable to severe DDoS attacks. To enhance security and reliability, we propose a decentralized DDNS update system built on a Redactable blockchain, leveraging Bloom Filter technology to optimize and accelerate DNS queries within the blockchain. This system can effectively defend against common threats such as DDoS attacks and DNS spoofing attacks. By leveraging Chameleon hashing and hash chain technologies, it safeguards the integrity of DNS records against unauthorized modifications and ensures the privacy of device movements, thereby improving the overall stability of the V2X communication system.
