A Study Of Aggregate Signcryption Schemes In Vehicular Ad Hoc Networks

In recent years,major technology companies,such as Apple,Letv,began to develop intelligent vehicles and intelligent transportation system.Vehicular ad-hoc network as the basis of the system,also gradually noticed by people.As an open and mobile self-organizing networks formed by the vehicles which driving on the road,which is vulnerable to malicious attacks and interception,so design of high efficiency and reliable security mechanism is one focus of current vehicle network.This thesis studied the characteristics of the vehicle network and security requirements,for the communication security problems in the traffic information systems acquisition modules,it analyzes the research status of aggregate cryptographic schemes,a leakage resilient identity-based aggregate signcryption scheme was constructed based on Wang's unrestricted identity-based aggregate signcryption scheme,the security proof to this leakage resilient scheme was also provided.The scheme provides a new way for defensive side-channel attacks in vehicular ad-hoc network.Then,this thesis improved the scheme above,proposed an aggregate signcryption scheme combined pseudonymous ID which is suitable for vehicular ad-hoc network,and analyses its security.The scheme creatively applying aggregate signcryption to vehicular ad-hoc network,makes it possible to use pairing-based cryptography in vehicular ad-hoc network which has critical realtime requirement.Finally by writing code,set up the simulation platform,and carry on simulation experiment,the computational overhead of the scheme,the storage size of the signcryption and feasibility are analyzed in detail,this leakage resilient identity-based aggregate signcryption scheme is verified under the condition of certain limits can be applied to vehicular ad-hoc network.