隨著無線通訊技術的進步和廣泛部署，促進了智能交通系統的蓬勃發展，其中車載自組網路是構成智能交通系統的重要技術之一。車載自組網路主要由車輛與路邊基礎設施透過專用短距離通訊技術進行資料交換來維持交通安全。然而在開放通道進行資料交換容易受到攻擊的影響，儘管已經有許多學者提出滿足身分驗證和安全性的相關方法，但仍然存在通訊與計算性能方面的問題，因此，車輛如何有效地驗證資料來源與確保資料完整性是重要的議題。
本文提出一種在車聯網環境下基於橢圓曲線密碼的無憑證身分鑑別協定，我們使用無憑證解決了憑證撤銷列表的問題，車輛不需頻繁地檢查撤銷列表所以可以提高通訊效率，此外，現有文獻尚未提出如何建立一個安全通道，因此我們的註冊階段是在公開通道進行，增加實作上的彈性。最後，我們所提出的方法只使用橢圓曲線密碼學和一般的雜湊函數來減少計算成本，與最近類似的方法相比在計算和通訊成本方面都有良好的表現。

The progress and extensive adoption of wireless communication technologies have led to significant growth in the development of Vehicular ad-hoc networks (VANET). VANET is mainly used to maintain traffic safety by exchanging data between vehicles and roadside units via Dedicated short-range communications (DSRC) technology. However, data exchange in the insecure channel is vulnerable to attacks and although many scholars have proposed relevant methods to satisfy authentication and security, there are still communication and computational performance problems, so how to effectively verify data sources and ensure data integrity in vehicles is an important issue.
In this thesis, we propose an elliptic curve cryptography-based certificateless identity authentication protocol in the internet of vehicle environment, we use certificateless to solve the problem of the certificate revocation list, the vehicle does not need to check the revocation list frequently so it can improve the communication efficiency. In addition, the existing literature has not explained how to establish a secure channel, so our registration stage is carried out in the insecure channel to increase flexibility in implementation. Finally, our proposed method effectively reduces computational and communication costs by utilizing elliptic curve cryptography and general hash functions, outperforming similar recent methods in terms of efficiency.

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