Presentation of the challenges related to the detection of manipulation or tampering of digital images, and description of the funtionalities offered by the REVEAL Media Verificaiton Assistant that is integrated in the InVID Verification Plugin.
Presentation of the InVID technologies for image forensics analysis
1. Markos Zampoglou
Postdoctoral Research Associate, CERTH
Workshop on Content Verification Tools
June 6, 2018 @ Thessaloniki, Greece
DETECTING MALICIOUS TAMPERING
IN DIGITAL IMAGES
2. Image forgeries in the news
https://thelede.blogs.nytimes.com/2008/07/10/in-an-iranian-image-a-missile-
too-many/
8. Features
• Tampering localization maps
• “Magnifying glass”
• GPS localization
• Thumbnails
• Metadata
• Tutorials and examples
• Export PDF
9. Using the tools
1. Magnifying glass
2. Tampering localization
• Do more than one maps agree?
• Does the highlighted region correspond to a specific
object/part?
• Is this part suspicious/interesting?
3. Reverse search
• Is this the best version for analysis?
11. The pitfalls of image forensics
“MH17 – Forensic Analysis of Satellite Images
Released by the Russian Ministry of Defence”
• A report by Bellingcat1 using ELA to prove that the
Russian MoD had forged the images
• N. Krawetz: Bellingcat “misinterpreted the results”2
1https://www.bellingcat.com
2http://www.hackerfactor.com/blog/index.php?/archives/676-Continuing-Education.html
12. The future of image forensics
https://www.technologyreview.com/s/610784/this-algorithm-
automatically-spots-face-swaps-in-videos/
13. Acknowledgements
• Dr. Chryssanthi Iakovidou (CAGI algorithm)
• Olga Papadopoulou (back-end development)
• Lazaros Apostolidis (front-end development)
• Dr. Symeon Papadopoulos (Overview & design)
• Ruben Bouwmeester, DW (Design and evaluation)
• Yiannis Kompatsiaris (Overview)