Tampering Detection on Digital Evidence for Forensics Purposes
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 e...
- Autores:
-
Duvan Ortiz, Héctor
Renza. Diego
Ballesteros L., Dora M.
- Tipo de recurso:
- Fecha de publicación:
- 2018
- Institución:
- Universidad EAFIT
- Repositorio:
- Repositorio EAFIT
- Idioma:
- spa
- OAI Identifier:
- oai:repository.eafit.edu.co:10784/13191
- Acceso en línea:
- http://publicaciones.eafit.edu.co/index.php/ingciencia/article/view/4818
http://hdl.handle.net/10784/13191
- Palabra clave:
- Watermarking
Fragile watermarking
Digital forensics
Tampering detection
Collatz conjecture
Marcado de agua
Marcado frágil
Multimedia forense
Detección de manipulaciones
Conjetura de Collatz
- Rights
- License
- Copyright (c) 2018 Héctor Duvan Ortiz, Diego Renza, Dora M. Ballesteros L.
Summary: | 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 paper, 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. |
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