사진파일 Exif GPS정보 조작여부 판단에 관한 연구

Abstract

Recently, several manufacturers offer cameras and smartphones with a built-in GPS (Global Positioning System) receiver. GPS on smartphones is no longer an emerging trend. It’is almost a must-have feature nowadays. A picture can be tied to a geographer location, through GPS function so we can identify the position of the photographer. The location information of a picture can be important clues in solving crimes in terms of digital forensics perspective. In this thesis We introduce several types of identifying schemes which detect the similarity between two files. Moreover, we analyze the file attribute structures to obtain time and geographic information in file systems. In the end, we propose a method to detect similar files which include the different GPS information based on LBS and manipulation of Exif GPS information in photographic files. The proposed scheme can be applied to provide some clues to solve civil and criminal cases.