With the rapid proliferation of inexpensive acquisition and storage devices, multimedia objects can be easily created, stored, transmitted, modified and tampered with by anyone. During its lifetime, a digital object might go through several processing stages, including multiple analog-to-digital (A/D) and digital-to-analog (D/A) conversions, coding and decoding, transmission, editing (either aimed at enhancing the quality, creating new content, mixing pre-existing material, or tampering with the content).
The REWIND project starts from the fact that each of these processing steps necessarily leaves a characteristic footprint, which can be potentially detected and analyzed to trace back the past history of the available multimedia object in a blind fashion, i.e. without having access to the original content. The project develops a comprehensive set of new mathematical models and techniques for footprint detection, applicable also for complex processing chains, and development of tools for phylogeny analysis.
Responsibilities of Fraunhofer IDMT
- Coordination of requirement analysis, use-case driven R&D and evaluation of detectors
- Development of a framework for automatic testing of detectors