Certificateless Aggregate Signature Scheme With Security Proofs in the Standard Model Suitable for Internet of Vehicles

In the Internet of Vehicles (IoV), the data center will receive a large number of data-signature pairs sent by vehicle-mounted communication devices and needs to quickly verify the validity of the signatures. Using aggregated signatures, the validity of multiple signatures can be verified by performing only one verification calculation, which significantly improves the calculation efficiency and is very suitable for the Internet of Vehicles. Unfortunately, security proofs of most certificateless aggregate signature (CLAS) schemes are implemented in the random oracle model (ROM). It is known that schemes with provable security in ROM may be vulnerable in real situations. Therefore, there may be potential security risks when these schemes are applied to the IoVs. In this paper, the system model and security demands of a CLAS scheme for IoVs were put forward. Afterwards, a concrete scheme was constructed and the security proofs were achieved in the standard model (SM). In the end, the advantage enjoyed by new scheme was demonstrated by making a comparison on performance for several schemes.