Research On Secure Access Control Policy In Internet Of Vehicles

The Internet of Vehicles(IoV)is an important branch of the Internet of Things in the field of intelligent transportation.With the mature of sensor technology,wireless communication,control technology and the Internet,IoV is developing rapidly.However,the dependence of these technologies and the property like independent and frequently changed communication topology of IoV have made it been more vulnerable to increasing complicated network attacks,which brings new challenges to the security services.Especially,the diversity of IoV environment and various resources make the access control to communication nodes crucial to security services.Preventing the disclosure and tempering of sensitive information in IoV can prevent the owner's property and safety from being threatened.Therefore,it is of great practical significance to study the access control of communication nodes in IoV.Currently,the access control of IoV is mainly based on the traditional access control technology which cannot meet the security requirement in the specific scenario of IoV resulting from its non-scalability and weak security.Based on the comprehensive analysis to the related research on the security of IoV,this thesis mainly studies the access control and encryption mechanism.The main work and innovation of this thesis are as follows.Firstly,based on the study on the traditional attributes based access control model,this thesis proposes an attribute based access control model of IoV.We add the trust value of vehicle into the attribute set of access control model to control the credibility of vehicles.Then,we give a trust value calculation method and define four trust components to quantified the trust of vehicle nodes.Secondly,this thesis studies the shortcoming of the access control policy,considering the non-extensibility of the access control policy,we adopted Disjunctive Normal Form to the access policy under specific scenarios based on the attribute based access control model we proposed.Then,we design an attribute based encryption algorithm and give the concrete implementation of initialization,key generation,encryption and decryption functions.Finally,the formal analysis and security proof of the scheme are carried out by using the attack game in the attribute based Selective-Set model.The encryption scheme is analyzed through the simulation experiment.It is proved that the encryption and decryption delay is controlled within a reasonable range while ensuring the security,and the calculation and the storage capacity are reduced.