Challenge: Existing methods for detecting adversarial attacks need original/adversarial data.
Approach: They propose to detect adversarial text by voting on hard labels from predictions of transformations using a model that uses original/adversarial data.
Outcome: The proposed method detects adversarial text across various state-of-the-art attacks, models, and datasets without training.

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CheckHARD: Checking Hard Labels for Adversarial Text Detection, Prediction Correction, and Perturbed Word Suggestion (2022.findings-emnlp)

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Challenge: Existing work detects adversarial text and corrects the prediction by identifying perturbed words and changing them into their synonyms, but many benign words are also changed.
Approach: They propose to detect adversarial text, correct the prediction, and suggest perturbed words by checking the change in the hard labels from the target’s predictions.
Outcome: The proposed model outperforms existing work on various attacks, models, and datasets.
Adv-OLM: Generating Textual Adversaries via OLM (2021.eacl-main)

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Challenge: Recent studies have pointed out the vulnerability of deep learning models to adversarial attacks.
Approach: They propose a black-box attack method that adapts the idea of Occlusion and Language Models to the current state of the art attack methods.
Outcome: The proposed method outperforms existing methods on several text classification tasks.
Gradient-based Adversarial Attacks against Text Transformers (2021.emnlp-main)

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Challenge: Existing methods for obtaining adversarial examples are difficult with text data.
Approach: They propose a gradient-based adversarial attack against transformer models that searches for a distribution of adversarials parameterized by a continuous-valued matrix.
Outcome: The proposed attack outperforms existing methods on a variety of natural language tasks with matching imperceptibility.
“That Is a Suspicious Reaction!”: Interpreting Logits Variation to Detect NLP Adversarial Attacks (2022.acl-long)

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Challenge: Existing methods to detect adversarial text inputs are limited in performance and are not detectable via spell checkers.
Approach: They propose a model-agnostic detector of adversarial text examples that detects patterns in the logits of the target classifier when perturbing the input text.
Outcome: The proposed detector improves the state-of-the-art performance in recognizing adversarial inputs and exhibits strong generalization capabilities across different NLP models, datasets, and word-level attacks.
A Reinforced Generation of Adversarial Examples for Neural Machine Translation (2020.acl-main)

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Challenge: Neural machine translation systems fail on less decent inputs, which may harm the credibility of these systems.
Approach: They propose a paradigm that generates adversarial examples using reinforcement learning to expose pitfalls for a given performance metric.
Outcome: The proposed paradigm produces stable attacks with meaning-preserving adversarial examples.
TextHacker: Learning based Hybrid Local Search Algorithm for Text Hard-label Adversarial Attack (2022.findings-emnlp)

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Challenge: Existing textual adversarial attacks use gradient or prediction confidence to generate adversarials, making it hard to be deployed in real-world applications.
Approach: They propose a textual adversarial attack that randomly perturbs lots of words to craft an adversarial example.
Outcome: The proposed attack outperforms existing hard-label attacks in terms of attack performance and adversary quality.
How do humans perceive adversarial text? A reality check on the validity and naturalness of word-based adversarial attacks (2023.acl-long)

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Challenge: Existing text adversarial attacks are impractical in real-world scenarios where humans are involved.
Approach: They have surveyed 378 human participants about the perceptibility of text adversarial examples produced by state-of-the-art methods.
Outcome: The proposed methods ignore the property of imperceptibility or study it under limited conditions.
Large Language Models Are Better Adversaries: Exploring Generative Clean-Label Backdoor Attacks Against Text Classifiers (2023.findings-emnlp)

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Challenge: Backdoor attacks manipulate model predictions by inserting malicious "poison" instances that contain a specific pattern or "trigger."
Approach: They propose an attack that inserts style-based triggers into training and test data by using a poison selection technique to improve the effectiveness of both LLMBkd and existing backdoor attacks.
Outcome: The proposed attack achieves high success rates across a wide range of styles with little effort and no model training.
Humanizing Machine-Generated Content: Evading AI-Text Detection through Adversarial Attack (2024.lrec-main)

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Challenge: Despite the development of large language models, there are still significant challenges in detecting whether text is generated by a machine.
Approach: They propose a framework for a broader class of adversarial attacks to perform minor perturbations in machine-generated content to evade detection.
Outcome: The proposed framework can be compromised in as little as 10 seconds, and improves over iterative adversarial learning.
Attacking Visual Language Grounding with Adversarial Examples: A Case Study on Neural Image Captioning (P18-1)

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Challenge: Visual language grounding is widely studied in modern neural image captioning systems . a novel algorithm for crafting adversarial examples in image captions is proposed .
Approach: They propose an algorithm to craft adversarial examples in machine vision and perception . their approach provides two evaluation approaches to check if they can mislead systems .
Outcome: The proposed algorithm can craft visually-similar adversarial examples with randomly targeted captions or keywords, and the results are transferable to other image captioning systems.

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