arxivcs.CRcs.AIcs.HCcs.LG2026-07-03
PromptPET: Privacy-Utility Optimized Prompt Obfuscation
Ke Yang, Olivia Figueira, Umar Iqbal, Athina Markopoulou
Privacy is an important challenge when users interact with AI chatbots, since users may share sensitive information, explicitly or implicitly, and AI chatbots can use this information for user profiling. In this paper, we aim to protect user privacy via a user-side mechanism that…