As surveillance footage plays an increasingly significant role in law enforcement, it is imperative to ensure the integrity of recorded video data and the authenticity of its originator, and instill situation awareness into these monitoring systems with a fidelity record of the incidents. Unfortunately, existing frame-based networked surveillance systems could only partially fulfill these requirements. The emerging Dynamic Vision Sensor (DVS) sheds new light on solving this problem with its completely different sensor design, i.e., DVS responds only to temporal intensity change and records only sparse asynchronous address-events with precise timing information. Motivated by the reduced data size of activities and the prevention of privacy intrusion of subjects under surveillance as well as other appealing attributes, this work introduces the first event-driven physical unclonable function (Ed-PUF) system to fill the forensic gap of simultaneously authenticating the event data integrity and source camera identity for reactive monitoring by DVS camera. New DVS sensor architecture is proposed with negligible modifications made to the original DVS pixel. The Ed-PUF response bit can only be triggered by and uniquely dependent on the asynchronous addressed event without being interfered by the simultaneous firing of other address events. Address event streams are securely transmitted with an event package tag created by a keyed hash-based message authentication code with the key being the Ed-PUF response. A secure protocol to authenticate the identity of DVS camera and the integrity of address events transmitted through cellular network is also proposed. A camera lock is embedded to protect against severing and splicing the inter-chip connectivity within the camera for raw PUF responses. The proposed system is evaluated using raw PUF data obtained by post-layout Monte Carlo simulation in UMC 180nm technology and real event stream captured by a DVS camera. The proposed Ed-PUF has been demonstrated to have excellent uniqueness, randomness and reliability. Collision test is also conducted to show that the quality of DVS imaging is not compromised. Besides keeping the hardware/power/timing overheads low, the proposed scheme is also analyzed to be resilient against multiple attack scenarios.

中文翻译：

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Ed-PUF：基于事件的物理无克隆功能，用于无源监控系统中的摄像机身份验证

由于监视镜头在执法中的作用日益重要，因此必须确保记录的视频数据的完整性及其源头的真实性，并通过事件的真实记录将情况意识灌输到这些监视系统中。不幸的是，现有的基于框架的网络监视系统只能部分满足这些要求。新兴的动态视觉传感器（DVS）通过其完全不同的传感器设计为解决此问题提供了新的思路，即DVS仅对时间强度变化做出响应，并且仅记录具有精确时序信息的稀疏异步地址事件。动机是由于活动的数据量减少了，并防止了受监视对象的隐私侵扰以及其他吸引人的属性，这项工作引入了第一个事件驱动的物理不可克隆功能（Ed-PUF）系统，以填补同时认证事件数据完整性和源摄像机身份以进行DVS摄像机被动监视的法医空白。提出了新的DVS传感器架构，并对原始DVS像素进行了微不足道的修改。Ed-PUF响应位只能由异步寻址事件触发，并且唯一取决于异步寻址事件，而不受其他地址事件的同时触发的干扰。地址事件流与事件包标签一起安全传输，该事件包标签是由基于键的基于散列的消息身份验证代码创建的，其中的键为Ed-PUF响应。还提出了一种安全协议，用于认证DVS摄像机的身份以及通过蜂窝网络传输的地址事件的完整性。嵌入式摄像机锁可防止切断和拼接摄像机内的芯片间连接，以响应原始PUF响应。使用通过在UMC 180nm技术中进行布局后的蒙特卡洛模拟获得的原始PUF数据以及由DVS摄像机捕获的真实事件流，对提出的系统进行了评估。所提出的Ed-PUF已被证明具有出色的唯一性，随机性和可靠性。还进行了碰撞测试，以显示DVS成像的质量没有受到影响。除了将硬件/电源/定时开销保持在较低水平之外，还对提出的方案进行了分析，以应对多种攻击情况。使用通过在UMC 180nm技术中进行布局后的蒙特卡洛模拟获得的原始PUF数据以及由DVS摄像机捕获的真实事件流，对所提出的系统进行了评估。所提出的Ed-PUF已被证明具有出色的唯一性，随机性和可靠性。还进行了碰撞测试，以显示DVS成像的质量没有受到影响。除了将硬件/电源/定时开销保持在较低水平之外，还对提出的方案进行了分析，以应对多种攻击情况。使用通过在UMC 180nm技术中进行布局后的蒙特卡洛模拟获得的原始PUF数据以及由DVS摄像机捕获的真实事件流，对提出的系统进行了评估。所提出的Ed-PUF已被证明具有出色的唯一性，随机性和可靠性。还进行了碰撞测试，以显示DVS成像的质量没有受到影响。除了将硬件/电源/定时开销保持在较低水平之外，还对提出的方案进行了分析，以应对多种攻击情况。