中文摘要：

近年来多旋翼无人机发展迅速，已被广泛应用于全球各个领域、行业，但因缺乏行之有效的安全策略，加上部分用户不了解有关飞行条规，甚至蓄意破坏法规，各种“黑飞”乱闯、非法滥用等事件日益增多，给无人机行业健康发展和社会安全稳定带来了巨大挑战。因此，采取对无人机和用户进行身份验证和信息取证等措施，有益于解决以上突出问题。文章首次提出了无人机取证系统，能提前获取和保存用户非法行为的图像、视频等数字信息，能较好地解决上述问题。同时，文章还提出了确定用户身份的三重身份验证机制，根据用户行为建立了用户威胁等级分析模型，并对该模型进行了评估。结果表明，该模型能够准确区分用户威胁，为无人机取证系统提供了准确的取证标准。

英文摘要：

In recent years,multi-rotor unmanned aerial vehicle have developed quickly and havebeen widely used in fields and industries all over the world.However,due to the lack of effectivesafety strategies and the incomprehension of related fl ight regulations and the deliberate sabotage oflaws and regulations of some users,incidents of illegal and random fl ights,illegal usage and hostileattacks increase day by day.This presents a signifi cant challenge to the healthy development of theunmanned aerial vehicle industry and the safety and stability of the society.Therefore,taking measuressuch as the identity authentication and information forensics of unmanned aerial vehicle and their userscan be beneficial to solve the above prominent problems.The forensics system of unmanned aerialvehicle is put forward for the fi rst time in this paper.The system can acquire in advance and store theimages,videos and other digital information on the illegal actions of users,so it can better solve theabove problems.Meanwhile,this paper puts forward the authentication mechanism to confi rm the threeidentities of users.Based on users’actions,this paper develops an analysis model of users’threat leveland evaluates the model.The result shows that the model can accurately distinguish threats from usersand provides accurate forensics standards for the forensics system of unmanned aerial vehicle.