Benedikt Lorch and Rainer Böhme, "Landscape More Secure Than Portrait? Zooming Into the Directionality of Digital Images With Security Implications", USENIX Security Symposium, 2024. PDF
This repository contains the following code:
- Directionality detector based on steerable pyramids and based on the Sobel filter.
- Code to produce the synthetic symmetric images and the transformed versions, which were used to compare the directionality detectors based on steerable pyramids and the Sobel filter (Appendix B).
- Script to collect JPEG parameters from a directory.
We used early versions of conseal to simulate steganography, and sealwatch for the feature-based steganalysis experiments.
Additionally, we provide the predictions for CNN-based experiments. While the paper only reports the accuracy, the predictions allow evaluating additional metrics, such as false positive and false negative rates.