Practical implementation of a methodology for digital imagesauthentication using forensics techniques

This work presents a forensics analysis methodologyimplemented to detect modifications in JPEG digital images byanalyzing the image’s metadata, thumbnail, camera traces andcompression signatures. Best practices related with digitalevidence and forensics analysis are considered to determine if thetechnical attributes and the qualities of an image are consistentwith each other. This methodology is defined according to therecommendations of the Good Practice Guide for Computer-Based Electronic Evidence defined by Association of ChiefPolice Officers of UK; the methodology certainty level is verifiedby an efficiency coefficient, calculated by the quotient of thenumber of correct resolutions and the total number of analyzedimages. This methodology can help to determine if a specificdigital image can be used as evidence, and thereby, help toclarify events or incidents with legal, civil, administrative orcriminal implications. Another advantage of the methodology isthat it can be applied with open source software tools

کلیدواژه ها:

Forensic Science ، Digital Evidence ، ImageAuthenticity ، Forensic Analysis Methodology ، Digital ImageProcessing ، Image Technical Attributes