This repository includes the source code for "Finding Optimal Tangent Points for Reducing Distortions of Hard-label Attacks", which is published in NeurIPS 2021.

[Paper] [Slides] [Poster]

We kindly ask anybody who uses this code to cite the following bibtex:

@inproceedings{ma2021finding,
 author = {Ma, Chen and Guo, Xiangyu and Chen, Li and Yong, Jun-Hai and Wang, Yisen},
 booktitle = {Advances in Neural Information Processing Systems},
 editor = {M. Ranzato and A. Beygelzimer and Y. Dauphin and P.S. Liang and J. Wortman Vaughan},
 pages = {19288--19300},
 publisher = {Curran Associates, Inc.},
 title = {Finding Optimal Tangent Points for Reducing Distortions of Hard-label Attacks},
 url = {https://proceedings.neurips.cc/paper/2021/file/a113c1ecd3cace2237256f4c712f61b5-Paper.pdf},
 volume = {34},
 year = {2021}
}

+-- configures
|   |-- HSJA.json  # the hyperparameters setting of HSJA, which is also used in Tangent Attack and Generalized Tangent Attack.
+-- dataset
|   |-- dataset_loader_maker.py  # it returns the data loader class that includes 1000 attacks images for the experiments.
|   |-- npz_dataset.py  # it is the dataset class that includes 1000 attacks images for the experiments.
+-- models
|   |-- defensive_model.py # the wrapper of defensive networks (e.g., AT, ComDefend, Feature Scatter), and it converts the input image's pixels to the range of 0 to 1 before feeding.
|   |-- standard_model.py # the wrapper of standard classification networks, and it converts the input image's pixels to the range of 0 to 1 before feeding.
+-- tangent_attack_hemisphere # the folder of Tangent Attack (TA) 
|   |-- attack.py  # the main class for the attack.
|   |-- tangent_point_analytical_solution.py  # the class for computing the optimal tagent point of the hemisphere.
+-- tangent_attack_semiellipsoid  # the folder of Generailized Tangent Attack (G-TA)
|   |-- attack.py  # the main class for the attack.
|   |-- tangent_point_analytical_solution.py  # the class for computing the optimal tagent point of the semi-ellipsoid.
+-- cifar_models   # this folder includes the target models of CIFAR-10, i.e., PyramidNet-272, GDAS, WRN-28, and WRN-40 networks.
|-- config.py   # the main configuration of Tangent Attack.
|-- logs  # all the output (logs and result stats files) are located inside this folder
|-- train_pytorch_model  # the pretrained weights of target models
|-- attacked_images  # the 1000 image data for evaluation 

The folder of attacked_images contains the 1000 tested images, which are packaged into .npz format with the pixel range of [0-1]. This folder can be downloaded from https://drive.google.com/file/d/1NkfMPShB9dUuugyFr2T8KTKM4kdwfKC2/view?usp=sharing.

The folder of train_pytorch_model contains the pretrained weights of target models, which can be downloaded from https://drive.google.com/file/d/1VfCdU14nAhOvumXTIA-B8OC6XwGYvUml/view?usp=sharing.

In the attack, all logs are dumped to logs folder. The results of attacks are also written into the logs folder, which use the .json format. I have uploaded the compressed zip file of the experimental results onto https://drive.google.com/file/d/1JswjvdDpaWMU7keGLA5HaVnZkYP3LpUO/view?usp=sharing, so that you can directly use the results of baseline methods without repeatedly running experiments.

The following command could run Tangent Attack (TA) and Generalized Tangent Attack (G-TA) on the CIFAR-10 dataset under the untargetd attack's setting:

python tangent_attack_hemisphere/attack.py --gpu 0 --norm l2 --dataset CIFAR-10 --arch resnet-50
python tangent_attack_hemisphere/attack.py --gpu 0 --norm l2 --dataset CIFAR-10 --arch gdas
python tangent_attack_semiellipsoid/attack.py --gpu 0 --norm l2 --dataset CIFAR-10 --arch resnet-50
python tangent_attack_semiellipsoid/attack.py --gpu 0 --norm l2 --dataset CIFAR-10 --arch gdas

Once the attack is running, it directly writes the log into a newly created logs folder. After attacking, the statistical result are also dumped into the same folder, which is named as *.json file.

Also, you can use the following bash shell to run the attack of different models one by one.

./tangent_attack_CIFAR_undefended_models.sh

The commmand of attacks of defense models are presented in tangent_attack_CIFAR_defense_models.sh.

• The gpu device could be specified by the --gpu device_id argument.
• the targeted attack can be specified by the --targeted argument. If you want to perform untargeted attack, just don't pass it.
• the attack of defense models uses --attack_defense --defense_model adv_train/jpeg/com_defend/TRADES argument.

Our code is tested on the following environment (probably also works on other environments without many changes):

• Ubuntu 18.04
• Python 3.7.3
• CUDA 11.1
• CUDNN 8.0.4
• PyTorch 1.7.1
• torchvision 0.8.2
• numpy 1.18.0
• pretrainedmodels 0.7.4
• bidict 0.18.0
• advertorch 0.1.5
• glog 0.3.1

You can just type pip install -r requirements.txt to install packages.

In summary, there are three extra folders that can be downloaded, i.e., attacked_images, train_pytorch_model, and optionally logs.

The attacked_images can be downloaded from https://drive.google.com/file/d/1NkfMPShB9dUuugyFr2T8KTKM4kdwfKC2/view?usp=sharing. Besides, the targeted attack requires a randomly selected image of the target class in the validation set, and the validation set of the ImageNet dataset can be downloaded from https://drive.google.com/file/d/1sE1i25mXApKuBChdhSqLbcFUEXTYYF9H/view?usp=sharing.

The pre-trained weights of the target models can be downloaded from https://drive.google.com/file/d/1VfCdU14nAhOvumXTIA-B8OC6XwGYvUml/view?usp=sharing.

Before running experiments, please download above files and uncompress them to this project's root path.

Also, I have uploaded the compressed zip format file that contains running logs and experimental results onto https://drive.google.com/file/d/1JswjvdDpaWMU7keGLA5HaVnZkYP3LpUO/view?usp=sharing.

You can use these experimental results directly without spending a lot of time to re-run the experiments.