Abstract
Vehicular Ad-hoc Network (VANET) is a significant component of intelligent transportation system, which facilitates vehicles to share sensitive information and corporate with others. However, due to its unique characteristics, such as openness, dynamic topology and high mobility, VANET suffers from various attacks. This paper proposes an anti-attack trust management scheme in VANET called AATMS to evaluate the trustworthiness of vehicles. With the help of AATMS, vehicles in VANET can avoid malicious vehicles and cooperate with trusted vehicles. The idea of AATMS is mainly inspired by TrustRank algorithm, which is used to combat web spams. In this paper, we calculate local trust and global trust, which indicate the local and global trust relationships among vehicles. First, Bayesian inference is adopted to calculate local trust of vehicles based on historical interactions. Then we select a small set of seed vehicles according to local trust and some social factors. Once we identify the reputable seed vehicles, we use the local trust link structure of vehicles to evaluate the global trust of all vehicles. The simulation results show that AATMS can efficiently identify trustworthy and untrustworthy vehicles in VANET even under malicious attacks.
Highlights
Vehicular Ad-hoc Network (VANET) is a self-organized network, which is the key component contributing to Intelligent Transport System (ITS) [1]
In this paper, we present an anti-attack trust management scheme called AATMS to evaluate trustworthiness of vehicles in VANET
Social trust of vehicles from real life is introduced to select seed vehicles, which is helpful for defensing collusion attack
Summary
Vehicular Ad-hoc Network (VANET) is a self-organized network, which is the key component contributing to Intelligent Transport System (ITS) [1]. VANET contains two types of communication, i.e., vehicle-to-vehicle (V2V) and vehicleto-infrastructure (V2I) communication [2], through which vehicles can communicate directly with neighboring vehicles and Road Side Units(RSUs) [3]. The unique characteristics of VANET, such as high mobility and dynamic connections, make it vulnerable to various kinds of external and internal attacks [4]. Traditional security solutions, such as certificates [5], signatures [6] and Public Key Infrastructures (PKIs) [7], are for defensing the external attackers, while for authorized and authenticated attackers from internal, these solutions are useless. To against internal attacks, trust management is proposed [8]. Trust management assesses the trustworthiness of vehicles in VANET according to their historical interactions, vehicles can
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