The rapid growth of wireless communication and sensing technology will lead to an Internet of Vehicles (IoV) that builds a large network with interactions among the vehicles, roadside infrastructure, and the surrounding environment. This will allow a large amount of data to be gathered from vehicles through IoV nodes. On the other hand, the cloud provides on-demand computing resources and self-service. Therefore, the vast amounts of data collected by the IoV can be deployed to the cloud, and an authorized user can access it anytime from anywhere via the Internet. However, privacy and authorized access of data are the main issues for the data stored in the cloud. To deal with the security issues in a cloud environment, an attribute-based signcryption (ABSC) was presented that provides confidentiality, authenticity, and sender secrecy of the data stored in the cloud. However, an extensive amount of modular exponential operations and pairing incur an unfavorable computational overhead during the signcryption and key-distributing process in ABSC. To deal with the above challenges, we present a novel secure outsourced attribute-based signcryption for a cloud-based Internet of Vehicles in a smart city (SOABSC-IoV). The proposed scheme provides data confidentiality, data authentication, and key issuing and decreases the signcryption computational load in ABSC. Furthermore, this work reduces the computational load at the IoV node and the authorized user’s side by outsourcing the signcryption and unsigncryption algorithms. Finally, the experimental results demonstrate that our scheme is highly appropriate for cloud and IoV environments and has a lower computational complexity than the existing schemes.

无线通信和传感技术的迅速发展将催生车辆互联网（IoV），该网络通过车辆，路边基础设施和周围环境之间的相互作用来构建大型网络。这将允许通过IoV节点从车辆收集大量数据。另一方面，云提供按需计算资源和自助服务。因此，由IoV收集的大量数据可以部署到云中，并且授权用户可以随时随地通过Internet访问它。但是，隐私和数据的授权访问是存储在云中的数据的主要问题。为了解决云环境中的安全问题，我们提出了一种基于属性的签密（ABSC），它可以提供机密性，真实性，和发送者保密存储在云中的数据。但是，大量的模块化指数运算和配对在ABSC的签密和密钥分发过程中会产生不利的计算开销。为了应对上述挑战，我们为智能城市中基于云的车辆互联网提出了一种新颖的，基于属性的新颖安全外包基于特征的签密（SOABSC-IoV）。所提出的方案提供了数据机密性，数据认证和密钥发布，并减少了ABSC中的签密计算量。此外，这项工作通过将签密和非签密算法外包来减轻了IoV节点和授权用户侧的计算负担。最后，