Bandwidth Efficient Partial Authorized PSI

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Recent attacks on private set intersection (PSI) and PSI-like protocols have demonstrated that input privacy can be compromised when parties maliciously choose their inputs, even in protocols proven secure against malicious adversaries. To counter such attacks, Authorized PSI (APSI) introduces a judge who authorizes the elements of the parties before the intersection is computed. Falzon and Markatou (PETS 2025) proposed Partial-APSI, a privacy-preserving variant of APSI that prevents revealing