No offence, Bert -- I insult only humans! Multiple addressees sentence-level attack on toxicity detection neural network

19 Oct 2023  ·  Sergey Berezin, Reza Farahbakhsh, Noel Crespi ·

We introduce a simple yet efficient sentence-level attack on black-box toxicity detector models. By adding several positive words or sentences to the end of a hateful message, we are able to change the prediction of a neural network and pass the toxicity detection system check. This approach is shown to be working on seven languages from three different language families. We also describe the defence mechanism against the aforementioned attack and discuss its limitations.

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