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Adversarial Black-Box Attacks On Text Classifiers Using Multi-Objective Genetic Optimization Guided By Deep Networks

2020-11-08 04:30:14
Alex Mathai, Shreya Khare, Srikanth Tamilselvam, Senthil Mani
arXiv_AI
               
Abstract

We propose a novel genetic-algorithm technique that generates black-box adversarial examples which successfully fool neural network based text classifiers. We perform a genetic search with multi-objective optimization guided by deep learning based inferences and Seq2Seq mutation to generate semantically similar but imperceptible adversaries. We compare our approach with DeepWordBug (DWB) on SST and IMDB sentiment datasets by attacking three trained models viz. char-LSTM, word-LSTM and elmo-LSTM. On an average, we achieve an attack success rate of $65.67% for SST and 36.45% for IMDB across the three models showing an improvement of 49.48% and 101% respectively. Furthermore, our qualitative study indicates that $94\%$ of the time, the users were not able to distinguish between an original and adversarial sample.

Abstract (translated)

URL

https://arxiv.org/abs/2011.03901

PDF

https://arxiv.org/pdf/2011.03901.pdf

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