Blockchain‐based video forensics and integrity verification framework for wireless Internet‐of‐Things devices
Blockchain‐based video forensics and integrity verification framework for wireless Internet‐of‐Things devices
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DOI：
10.1002/spy2.143
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发表时间：
2020-12
影响因子：
1.9
通讯作者：
Suat Mercan;Mumin Cebe;R. S. Aygün;Kemal Akkaya;Elijah Toussaint;Dominik Danko
中科院分区：
文献类型：
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作者：
Suat Mercan;Mumin Cebe;R. S. Aygün;Kemal Akkaya;Elijah Toussaint;Dominik Danko
对于法医调查至关重要的摄像机镜头可以通过先进的视频篡改技术轻松修改。这就要求在刑事侦查中采用新的方法来保持和证明现场的完整性。在这种情况下，区块链技术在过去十年中受到了极大的关注，因为它在没有可信第三方的情况下提供了用户之间的信任，从而实现了无数的应用程序。为此，我们提出了一个框架，该框架利用区块链技术来验证由资源受限的无线物联网（IoT）设备记录的摄像机镜头的完整性。所提出的方法在视频数据离开物联网设备之前计算其哈希值，以确保完整性。然后，哈希值被存储在一个允许的区块链平台上，该平台可以检测视频中的篡改。连续流被有效地分段以具有周期性哈希值，以最大限度地降低设备故障时视频丢失的风险。该系统已在Raspberry Pi和Hyperledger上实现，以验证其效率。我们能够在资源有限的情况下处理高分辨率视频，并具有合理的延迟。通过使用许可区块链中保存的摘要成功验证了录制视频的完整性。
A camera footage which is essential for forensic investigations can easily be modified with advanced video tampering techniques. This makes it necessary to employ novel methods to retain and prove the integrity of captured scene in criminal investigations. In this vein, blockchain technology has received a substantial interest in the last decade as it provides trust among users without a trusted third party, which enabled a myriad of applications. To this end, we propose a framework that utilizes blockchain technology to verify integrity of a camera footage recorded by a resource‐constrained wireless Internet of Things (IoT) device. The proposed approach computes the hash of the video data before it leaves the IoT device to ensure the integrity. The hash is then stored on a permissioned blockchain platform that enables detection of tampering in the video. The continuous stream is segmented efficiently to have periodic hash value to minimize the risk of video loss in case of device failure. The system has been implemented on a Raspberry Pi and Hyperledger to validate its efficiency. We are able to process high resolution videos on a resource‐constrained with reasonable amount of delay. The integrity of recorded video is successfully verified by using the digest kept in permissioned blockchain.