Abstract
The mobile device ecosystem has dramatically evolved over the last few years, since users have openly embraced a massive use of mobile phones for different purposes: professional use, personal use, etc. Digital videos can be used to define legal responsibilities or as part of the evidence in trials. The forensic analysis of digital videos becomes very relevant to determine the origin and authenticity of a video in order to link an individual with a device, place or event. The field of forensic analysis of digital videos is constantly facing new and direct challenges. Even though the basic principles of this discipline remain unchanged, numerous issues appear every year that require new procedures and tools. Therefore, it is necessary to provide forensic analysts with techniques to identify the origin of multimedia content. In this paper, the topic of source identification in open scenarios will be discussed, since analysts do not know in advance the set of cameras to which a video belongs so they find it difficult to identify its source. This approach is similar to real-life situations since in most cases, analysts are unaware of the set of video cameras. This paper aims to create a technique that identifies the source of digital videos generated by digital devices through the use of unsupervised algorithms based on the analysis of the structure of multimedia video devices.
Highlights
The field of mobile devices forensics has emerged in recent years becoming one of the most important areas of investigation, for several reasons
DATASETS In order to carry out the experiments, two datasets have been used, are: VISION dataset [25] and ACID dataset [4], because they are the most complete and current datasets available for forensic analysis in multimedia videos and they are the most recent in the literature
With both datasets we cover the largest number of digital videos available in our society, that is, videos from mobile devices, digital cameras and videos from the main messaging platforms (Whatsaap) and video sharing (Youtube)
Summary
The field of mobile devices forensics has emerged in recent years becoming one of the most important areas of investigation, for several reasons. The capabilities of smart devices have improved substantially, and smartphones are being used more than laptops since users have them at their fingertips at any time of the day. These smart devices are constantly recording our activities and movements, which in turn give us a vision of our behaviour [1]. The combination of smart mobile phones with social media platforms and cloud storage has allowed video to become a major source of information for many people and institutions These digital videos can be made at any time and anywhere for different purposes. They can be distributed on the internet in a short period of time and
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