The publish/subscribe system over the autonomous vehicular networks (AVNs) enables the content providers to obtain more profits from a flexible notification system. However, few of current works focus on flexible brokers suitable for AVNs. In this paper, we propose a truck platoon aided secure publish/subscribe system based on smart contract in AVNs. Firstly, the truck platoons are utilized to be the brokers of the publish/subscribe system to realize a more efficient and secure publish/subscribe system. Secondly, a vehicular blockchain is established for the publish/subscribe system to record the transactions between brokers and publishers/subscribers to guarantee the complete and safe implementation of the smart contracts. Next, a contract based on the principal-agent problem is designed between the publisher and broker to maximize their utilities and stimulate the broker to be more active in the contents subscribing service. Furthermore, a smart contract is also designed between the subscriber and broker by the cloud server to achieve higher utilities and match an appropriate broker for the subscriber by considering its type. Finally, we carry out extensive numerical results to evaluate the performances of the proposed contracts, while the results also demonstrate that the proposal outperforms the conventional schemes.

中文翻译：

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自主车辆网络中基于智能合约的卡车编队辅助安全发布/订阅系统

自主车辆网络（AVN）上的发布/订阅系统使内容提供商可以从灵活的通知系统中获得更多收益。但是，当前的工作很少集中于适用于AVN的灵活经纪人。在本文中，我们提出了基于AVNs中智能合约的卡车排辅助安全发布/订阅系统。首先，利用卡车排作为发布/订阅系统的中介，以实现更有效，更安全的发布/订阅系统。其次，建立用于发布/订阅系统的车辆区块链，以记录经纪人与发布者/订阅者之间的交易，以确保智能合约的完整和安全实施。下一个，在发行人和经纪人之间设计了一个基于委托代理问题的合同，以最大程度地发挥其效用，并激发经纪人在内容订购服务中更加活跃。此外，云服务器还在订户和代理之间设计了智能合约，以实现更高的实用性，并通过考虑订户的类型为订户匹配合适的代理。最后，我们进行了广泛的数值分析，以评估拟议合同的绩效，同时结果也表明该提议优于常规方案。云服务器还在订户和代理之间设计了一个智能合约，以实现更高的实用性，并通过考虑订户的类型为订户匹配合适的代理。最后，我们进行了广泛的数值分析，以评估拟议合同的绩效，同时结果也表明该提议优于常规方案。云服务器还在订户和代理之间设计了一个智能合约，以实现更高的实用性，并通过考虑订户的类型为订户匹配合适的代理。最后，我们进行了广泛的数值分析，以评估拟议合同的绩效，同时结果也表明该提议优于常规方案。