Several types of networks that comprise unmanned aerial vehicles (UAV or drone) are being utilized in important applications such as emergency response, environment and infrastructure monitoring, defense and security, and commerce. In such networks, swarms of UAVs cooperate in executing one or more missions to achieve the application's objectives. The UAVs communicate with terrestrial networks by connecting to fixed or mobile ground control stations (GCS). The ability of drones to connect to online applications and offer services to Internet users has led to the proliferation of the Internet of Drones (IoD). However, IoD applications are highly vulnerable to many types of cyberattacks. Hence, mechanisms must be deployed to secure the IoD operations and data. Recently, the blockchain has been proposed as a solution to detect and prevent malicious attacks on the UAV network (UAVN). Due to the UAV's limited resources, it becomes a challenge to integrate the blockchain into the IoD. In this paper, we propose a model that enables a drone to store the important data that it requires during its flight within a lightweight blockchain system. In addition, we propose a new blockchain consensus mechanism in which several miners produce their blocks in parallel, which decreases the time needed to add transactions securely to the blockchain and meets the requirements of delay-sensitive applications. Our simulations prove the advantages of the proposed model in decreasing the transaction-to-blockchain delay, the average drone energy consumption, and the blockchain block size as compared to other IoD blockchain systems.

包括无人驾驶飞行器（UAV 或无人机）在内的几种类型的网络正被用于紧急响应、环境和基础设施监测、国防和安全以及商业等重要应用中。在这样的网络中，成群的无人机合作执行一项或多项任务以实现应用程序的目标。无人机通过连接到固定或移动地面控制站 (GCS) 与地面网络进行通信。无人机连接在线应用程序并向互联网用户提供服务的能力导致了无人机互联网 (IoD) 的普及。但是，IoD 应用程序极易受到多种类型的网络攻击。因此，必须部署机制来保护 IoD 操作和数据。最近，区块链已被提出作为检测和防止对无人机网络（UAVN）的恶意攻击的解决方案。由于无人机资源有限，将区块链集成到 IoD 中成为一项挑战。在本文中，我们提出了一种模型，该模型使无人机能够在轻量级区块链系统中存储其飞行过程中所需的重要数据。此外，我们提出了一种新的区块链共识机制，在该机制中，多个矿工并行生产他们的区块，这减少了将交易安全地添加到区块链所需的时间，并满足对延迟敏感的应用程序的要求。我们的模拟证明了与其他 IoD 区块链系统相比，所提出的模型在减少交易到区块链延迟、平均无人机能耗和区块链块大小方面的优势。