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Charmer: Revisiting Character-level Adversarial Attacks for Language Models

Official implementation in PyTorch of the ICML'24 paper "Revisiting Character-level Adversarial Attacks for Language Models".

Requirements

conda create -n lmrobust python=3.8
conda install pytorch==2.0.0 torchvision==0.15.0 torchaudio==2.0.0 pytorch-cuda=11.7 -c pytorch -c nvidia
conda install -c anaconda jupyter
pip install -r requirements.txt

baseline includes auxiliary code not written by authors.

Sample scripts

To run Charmer in the TextAattack BERT, RoBERTa and ALBERT models, run the separate dataset scripts in scripts, e.g.:

cd scripts
bash run_sst.sh

This will produce a .csv file similar to:

original,perturbed,True,Pred_original,Pred_perturbed,success,Dist_char,Dist_token,similarity,time
Fears for T N pension after talks Unions representing workers at Turner   Newall say they are 'disappointed' after talks with stricken parent firm Federal Mogul.,Fears for T E pension :fter talks Unions representing workers at Turner   Newall say they are 'disappointed' after talks with stricken parent firm Federal Mogul.,2,2,3,True,2,4,0.9770777225494384,3.747948408126831

where each column is:

• original: Original sentence.
• perturbed: Sentence after the attack.
• True: True label of the sentence.
• Pred_original: Prediction of the model for the original sentence.
• Pred_perturbed: Prediction of the model for the attacked sentence.
• success: True if Pred_original != Pred_perturbed.
• Dist_char: Levenshtein distance in the character-level between original and perturbed.
• Dist_token: Levenshtein distance in the token-level between original and perturbed.
• similarity: USE between original and perturbed.
• time: Time needed to produce perturbed.

Cite as:

@inproceedings{Abad2024Charmer,
  author = {Abad Rocamora, Elias and Wu, Yongtao and Liu, Fanghui and Chrysos, Grigorios G and Cevher, Volkan},

  title = {Revisiting Character-level Adversarial Attacks for Language Models},

  booktitle = {International Conference on Machine Learning (ICML)},

  year = {2024}
}