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SoK: PIAtlas: Decomposing the Unbounded Prompt Injection Attack Space

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Summary

This Systematization of Knowledge presents PIAtlas, a taxonomy of prompt injection attacks organized by how the injected instruction is constructed to subvert the model, with six classes forming the roots of a hierarchy of techniques. The authors release PICorpus and map thousands of records from more than twenty public datasets to PIAtlas under a human-verified protocol. The mapping finds that attacks usually combine techniques from a few mechanisms and that widely used agent benchmarks test only part of the attack space.