@Article{cmc.2020.07188,
AUTHOR = {Cui Li, Gang Wu, Lipeng Xing, Feng Zhu, Liang Zhao},
TITLE = {An Efficient Certificateless Aggregate Signature Scheme Designed  for VANET},
JOURNAL = {Computers, Materials \& Continua},
VOLUME = {63},
YEAR = {2020},
NUMBER = {2},
PAGES = {725--742},
URL = {http://www.techscience.com/cmc/v63n2/38540},
ISSN = {1546-2226},
ABSTRACT = {The Vehicular Ad-hoc Network (VANET) is the fundamental of smart 
transportation system in the future, but the security of the communication between 
vehicles and vehicles, between vehicles and roadside infrastructures have become 
increasingly prominent. Certificateless aggregate signature protocol is used to address 
this security issue, but the existing schemes still have many drawbacks in terms of 
security and efficiency: First, many schemes are not secure, and signatures can be forged 
by the attacker; Second, even if some scheme are secure, many schemes use a large 
number of bilinear pairing operation, and the computation overhead is large. At the same 
time, the length of the aggregated signature also increases linearly with the increase of 
user numbers, resulting in a large communication overhead. In order to overcome the 
above challenges, we propose a new certificateless aggregate signature scheme for
VANET, and prove the security of the scheme under the random oracle model. The new 
scheme uses pseudonym to realize the conditional privacy protection of the vehicle’s
information. The new scheme does not use bilinear pairing operation, and the calculation 
efficiency is high. At the same time, the length of the aggregate signature of the new 
scheme is constant, thereby greatly reducing the communication and storage overhead.
The analysis results demonstrate that the new scheme is not only safer, but also superior 
in performance to the recent related schemes in computation overhead and 
communication cost.},
DOI = {10.32604/cmc.2020.07188}
}