Anonymous authentication method based on certificateless group signature in Internet of Vehicles

The invention provides an anonymous authentication method based on certificateless group signature in Internet of Vehicles. The anonymous authentication method comprises the following steps: initializing a system; generating public and private keys of the group administrator and the group members; carrying out member joining: wherein newly joining members join in the existing Internet of Vehiclesgroup according to a group joining method, generate own synchronization factors and update the group synchronization factors, the group administrator verifies the legality of the identity of the newlyadded member and generates a certificate for the newly added member, and the newly added member verifies the legality of the identity of the group administrator and accepts the own certificate, the group administrator publishes a new synchronization factor, and other members in the group update own synchronization factors; carrying out signature generation: the group members realize signature ofthe message based on a sign