Poison Attacks against Text Datasets with Conditional Adversarially Regularized Autoencoder
Alvin Chan, Yi Hong Tay, Yew-Soon Ong, Aston Zhang · 2020
This paper demonstrates a fatal vulnerability in natural language inference (NLI) and text classification systems.More concretely, we present a 'backdoor poisoning' attack on NLP models.Our poisoning attack utilizes conditional adversarially regularized autoencoder (CARA) to generate poisoned training samples by poison injection in latent space.Just by adding 1% poisoned data, our experiments show that a victim BERT finetuned classifier's predictions can be steered to the poison target class with success rates of > 80% when the input hypothesis is injected with the poison signature, demonstrating that NLI and text classification systems face a huge security risk.