Cryptanalysis of “Multi-Party Private Set Intersection With One-Round Online Interaction”
Abstract
In this letter, we identify critical vulnerabilities in both protocols proposed by Zhao et al. (published in IEEE TIFS, doi: 10.1109/TIFS.2025.3574993), showing that they are susceptible to collusion attacks. In the first protocol, the leaderP1can determine whether its items are held by any honest party by colluding with other participants. In the second protocol,P1can infer whether all honest parties hold a specific item without any collusion, violating the fundamental privacy guarantees of multi-party private set intersection.
Fields of Study & Subjects
Cryptography and Data Security
Privacy-Preserving Technologies in Data
Advanced Authentication Protocols Security
Publication details
- Journal / source
- IEEE Transactions on Information Forensics and Security
- Volume
- 21
- Pages
- 3481–3482
- Publication date
- 1 January 2026
- Language
- EN