Textual Backdoor Attack through Repositioning: A Novel Approach to Stealthy and Semantics-Preserving Triggers

We present OrderBkd, a novel textual backdoor attack that leverages the repositioning of words based on their part-of-speech tags to create stealthy and semantics-preserving triggers. Our attack outperforms existing methods in terms of perplexity and semantic similarity while maintaining comparable attack success rates.