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首页> 外文期刊>International journal of digital crime and forensics >MapExif: An Image Scanning and Mapping Tool for Investigators
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MapExif: An Image Scanning and Mapping Tool for Investigators

机译：MapExif：研究人员的图像扫描和映射工具

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Recently, the integration of geographical coordinates into a picture has become more and more popular. Indeed almost all smartphones and many cameras today have a built-in GPS receiver that stores the location information in the Exif header when a picture is taken. Although the automatic embedding ofgeotags in pictures is often ignored by smart phone users as it can lead to endless discussions about privacy implications, these geotags could be really useful for investigators in analysing criminal activity. Currently, there are many free tools as well as commercial tools available in the market that can help computer forensics investigators to cover a wide range of geographic information related to criminal scenes or activities. However, there are not specific forensic tools available to deal with the geolocation of pictures taken by smartphones or cameras. In this paper, an image scanning and mapping tool for investigators is proposed and developed. This tool scans all the files in a given directory and then displays particular photos based on optional filters (date/ time/device/localisation...) on Google Map. The file scanning process is not based on the file extension but its header. This tool can also show efficiently to users if there is more than one image on the map with the same GPS coordinates, or even if there are images with no GPS coordinates taken by the same device in the same timeline. Moreover, this new tool is portable; investigators can run it on any operating system without any installation. Another useful feature is to be able to work in a read-only environment, so that forensic results will not be modified. This tool s real-world application is also presented and evaluated in this paper.
机译：近来，将地理坐标集成到图片中变得越来越流行。实际上，当今几乎所有智能手机和许多相机都具有内置的GPS接收器，当拍照时，该接收器会将位置信息存储在Exif标头中。尽管智能手机用户经常忽略将地理标记自动嵌入图片中，因为这可能导致无休止地讨论隐私问题，但这些地理标记对于调查人员分析犯罪活动可能确实有用。当前，市场上有许多免费工具以及商业工具，可以帮助计算机取证调查人员涵盖与犯罪现场或活动有关的广泛地理信息。但是，没有可用的特定取证工具来处理由智能手机或相机拍摄的照片的地理位置。本文提出并开发了一种用于研究人员的图像扫描和绘图工具。此工具会扫描给定目录中的所有文件，然后根据可选过滤器（日期/时间/设备/本地化...）显示特定的照片（在Google Map上）。文件扫描过程不是基于文件扩展名，而是其标题。如果地图上有多个具有相同GPS坐标的图像，或者即使在同一时间轴上同一设备拍摄的GPS坐标没有图像，此工具也可以向用户有效显示。而且，这种新工具是便携式的。研究人员无需任何安装即可在任何操作系统上运行它。另一个有用的功能是能够在只读环境中工作，以便不会修改取证结果。本文还将介绍并评估该工具的实际应用。

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