| Summary: | 碩士 === 輔仁大學 === 圖書資訊學系碩士班 === 101 === Vehicular Ad-Hoc Network (VANET) is an application of Ad-Hoc Network, which can significantly improve the efficiency of transportation systems and allows the driver can exchange information via a privacy channel. The security is an important issues in the VANET system, because its significant impact, and the transportation systems may be paralyzed as a result of receiving the wrong traffic information. However, most of currently known schemes focus on a one by one basis. In real situation, the large amount of traffic flow will generate a lot of information at the same time. If the method is doing one by one, it is bound to lead to information delays, and the system will have difficulty to achieve real-time performance. Therefore, we shall propose two improved schemes based on the batch operation and bilinear pairing to make VANET more secure, efficient, and more suitable for practical use
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