%0 Journal Article
%T Tampering Detection on Digital Evidence for Forensics Purposes
%A Diego Renza
%A Dora M. Ballesteros L.
%A H¨Śctor Duvan Ortiz
%J -
%D 2018
%R https://doi.org/10.17230/ingciencia.14.27.3
%X In terms of digital evidence, images of a crime scene play an important role in a legal process; therefore it is essential to guarantee their chain of custody. If the image is tampered with operations such as cropping, duplicity or blurring of objects, there must be a mechanism that identifies the existence of such manipulation. In this project, a solution to the chain of custody based on a technique known as watermarking is proposed. In order to validate the sensitivity and effectiveness of the proposed system, six classes of manipulations are applied to watermarked images; finding a high sensitivity to small manipulations (e.g 0.25% of the image size), since in all cases the manipulation was identified. With the proposed solution, legal authority can rely on the chain of custody of the digital evidence
%K Watermarking
%K fragile watermarking
%K digital forensics
%K tampering detection
%K Collatz conjecture
%U http://publicaciones.eafit.edu.co/index.php/ingciencia/article/view/4818