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Improving Securiry in VANETs

Rezaei, Fatemeh | 2016

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 48983 (52)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Hemmatyar, Ali Mohammad Afshin
  7. Abstract:
  8. The Vehicular Ad hoc Network (VANET) have been presented to enhance the safety and comfort of driver and passengers. Thus, the functionality of VANET is related to the accuracy of disseminated messages about surrounding environment. Therefore, it is critical to detect the true reports among false reports which they have been reported by malicious nodes. However, in this research, the proposed scheme presents a centralized trust management assessment scheme named Detection of Best Report (DBR) in vehicular ad hoc environments. Each received message is evaluated individually according to its reporter interactions during event reporting. Based on this evaluation in RSU, the most reliable nodes and their reports are assigned a category level. Then, we use data fusion method that its parameters are trust value, certificate value, distance value, position value and their weights, which make decision for the best report selection among the Emergency Message from the nodes that have the degree of trustworthiness. The scheme integrates role-based trust with experience-based trust, to form a combined trust model, taking into account the history of the driver’s interactions. However, in order to evaluate the reliability and performance of our proposed method (DBR), we simulate it using Matlab simulator and compare it to the one of the comprehensive previous trust management methods. The simulation results present that the proposed method has less computational overhead that causes low delay and increase the packet delivery ratio than. Also, we present the trust degree for each node and it represent the reliability degree to each node
  9. Keywords:
  10. Vehicular Ad Hoc Network (VANET) ; Trust Management ; Ad Hoc Network ; Intelligent Transportation System (ITS) ; Enhanced Distributed Channel Access ; Improving Security

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