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cs.IR2026
PACT: Defending Recommendation against Promotional News Rewriting via Attack-Diverse Score Consistency
Chongxian Chen, Fan Mo, Xin Fan +1
Personalized news recommenders are increasingly vulnerable to LLM-powered promotional attacks, where content providers rephrase headlines to manipulate rankings without altering un…
cs.CL2026
Policy-Conditioned Constrained Decoding for Column-Level Access Control in Text-to-SQL
Ryoto Miyamoto, Xin Fan, Hayato Yamana
Text-to-SQL is increasingly deployed across trust boundaries between data providers and users. Such deployment must balance three competing requirements: policy compliance, answer…