- This repository contains codes for Prime+Count paper.
- You can try to build and test this covert channel between normal world and secure world.
- The source code in this repository is only for the normal world part.
- The secure world part can be implemented by using the same approach depending on your environment.
- Prime+Count implements fast covert channels in single-core and cross-core scenarios in the TrustZone.
- Prime+Count achieves low-noise covert channel via monitoring how many L1/L2 cache refill events happens.
- To get full details, See the paper.
- See comments in ./build.sh to get usage.
- Run ./build.sh with proper arguments.
- After ./build.sh, See output files under build/
- covert_lkm.ko : kernel module for building covert channel
- main : user application for testing
-
First of all, You have to update secure-os or trusted application running on secure-os.
$ insmod covert_lkm.ko $ ./main 1 1 images/01/data /tmp/01.csv (See comments in src/user/main.c to get full usage and example.) (images/01/data : input image to be transfered through Prime+Count covert channel) (/tmp/01.csv : output encoded image, encoded via bucket method)
- images/py_scrips/*.py are scripts to convert bucket-encoded image to real image.
- You can try to convert the bucket-encoded image with below instructions.
$ cd images/py_scripts/test/ $ python ../collect_image_set_counting_mode.py 01.csv (01.csv is prepared bucket-encoded image for testing) $ ls -l output.pbm (See output.pbm, and compare it to circle.pbm which is original image.)
- images/ : images for experiments.
- Under GPLv2.
- Copyrights are specificed under LICENSE.
- Haehyun Cho [email protected]
- Jinbum Park [email protected], [email protected]
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