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Private Set Intersection (PSI) is a vital cryptographic technique used for securely computing common data of different sets. In PSI protocols, often two parties hope to find their common set elements without needing to disclose their…

Cryptography and Security · Computer Science 2021-02-01 Alireza Kavousi , Javad Mohajeri , Mahmoud Salmasizadeh

Private Set Intersection (PSI) enables secure computation of set intersections while preserving participant privacy, standard PSI existing protocols remain vulnerable to data integrity attacks allowing malicious participants to extract…

Cryptography and Security · Computer Science 2025-10-01 Zixian Gong , Zhiyong Zheng , Zhe Hu , Kun Tian , Yi Zhang , Zhedanov Oleksiy , Fengxia Liu

One way to classify private set intersection (PSI) for secure 2-party computation is whether the intersection is (a) revealed to both parties or (b) hidden from both parties while only the computing function of the matched payload is…

Cryptography and Security · Computer Science 2022-08-30 Jian Du , Tianxi Ji , Jamie Cui , Lei Zhang , Yufei Lu , Pu Duan

In a Private section intersection (PSI) protocol, Alice and Bob compute the intersection of their respective sets without disclosing any element not in the intersection. PSI protocols have been extensively studied in the literature and are…

Cryptography and Security · Computer Science 2022-09-29 Florian Kerschbaum , Erik-Oliver Blass , Rasoul Akhavan Mahdavi

Two parties with private data sets can find shared elements using a Private Set Intersection (PSI) protocol without revealing any information beyond the intersection. Circuit PSI protocols privately compute an arbitrary function of the…

We present a new circuit-based protocol for multi-party private set intersection (PSI) that allows m parties to compute the intersection of their datasets without revealing any additional information about the items outside the…

Cryptography and Security · Computer Science 2024-01-24 Jiuheng Su , Zhili Chen , Xiaomin Yang

Secure computation protocols combine inputs from involved parties to generate an output while keeping their inputs private. Private Set Intersection (PSI) is a secure computation protocol that allows two parties, who each hold a set of…

Cryptography and Security · Computer Science 2024-10-07 Yuvaraj Athur Raghuvir , Senthil Govindarajan , Sanjeevi Vijayakumar , Pradeep Yadlapalli , Fabio Di Troia

Private set intersection (PSI) aims to allow users to find out the commonly shared items among the users without revealing other membership information. The most recently proposed approach to PSI in the database community was Prism, which…

Cryptography and Security · Computer Science 2023-03-14 Dongfang Zhao

In Private Set Intersection protocols (PSIs), a non-empty result always reveals something about the private input sets of the parties. Moreover, in various variants of PSI, not all parties necessarily receive or are interested in the…

Cryptography and Security · Computer Science 2024-04-29 Aydin Abadi

We propose a novel protocol for computing a circuit which implements the multi-party private set intersection functionality (PSI). Circuit-based approach has advantages over using custom protocols to achieve this task, since many…

Cryptography and Security · Computer Science 2023-09-15 Jiuheng Su , Zhili Chen

Private Set Intersection (PSI) is usually implemented as a sequence of encryption rounds between pairs of users, whereas the present work implements PSI in a simpler fashion: each set only needs to be encrypted once, after which each pair…

Cryptography and Security · Computer Science 2014-05-22 Nicholas Kersting

We investigate the problem of multi-party private set intersection (MP-PSI). In MP-PSI, there are $M$ parties, each storing a data set $\mathcal{p}_i$ over $N_i$ replicated and non-colluding databases, and we want to calculate the…

Information Theory · Computer Science 2020-08-18 Zhusheng Wang , Karim Banawan , Sennur Ulukus

Private set intersection (PSI) allows two mutually untrusting parties to compute an intersection of their sets, without revealing information about items that are not in the intersection. This work introduces a PSI variant called…

Cryptography and Security · Computer Science 2022-07-20 Anrin Chakraborti , Giulia Fanti , Michael K. Reiter

Private set intersection (PSI) enables a sender holding a set $Q$ of size $m$ and a receiver holding a set $W$ of size $n$ to securely compute the intersection $Q \cap W$. Fuzzy PSI (FPSI) is a PSI variant where the receiver learns the…

Cryptography and Security · Computer Science 2026-04-17 Xinpeng Yang , Meng Hao , Chenkai Weng , Robert H. Deng , Yonggang Wen , Tianwei Zhang

Multiparty private set intersection (MPSI) allows multiple participants to compute the intersection of their locally owned data sets without revealing them. MPSI protocols can be categorized based on the network topology of nodes, with the…

Cryptography and Security · Computer Science 2025-06-03 Xinyu Feng , Yukun Wang , Cong Li , Wu Xin , Ming Yao , Dian Zhang , Wanwan Wang , Hao He

Sensitive citizen data, such as social, medical, and fiscal data, is heavily fragmented across public bodies and the private domain. Mining the combined data sets allows for new insights that otherwise remain hidden. Examples are improved…

Cryptography and Security · Computer Science 2025-12-10 Kristof Verslype , Florian Kerschbaum , Cyprien Delpech de Saint Guilhem , Bart De Decker , Jorn Lapon

We provide an overview of PSI ("a Private data Sharing Interface"), a system we are developing to enable researchers in the social sciences and other fields to share and explore privacy-sensitive datasets with the strong privacy protections…

Cryptography and Security · Computer Science 2018-08-07 Marco Gaboardi , James Honaker , Gary King , Jack Murtagh , Kobbi Nissim , Jonathan Ullman , Salil Vadhan

We present a multi-language, cross-platform, open-source library for asymmetric private set intersection (PSI) and PSI-Cardinality (PSI-C). Our protocol combines traditional DDH-based PSI and PSI-C protocols with compression based on Bloom…

Multi-Party Private Set Intersection (MP-PSI) with threshold enhances the flexibility of MP-PSI by disclosing elements present in at least $t$ participants' sets, rather than requiring elements to appear in all $n$ sets. In scenarios where…

Cryptography and Security · Computer Science 2026-01-01 Le Yang , Weijing You , Huiyang He , Kailiang Ji , Jingqiang Lin

In 2012, De Cristofaro et al. proposed a protocol to calculate the Private Set Intersection and Union cardinality(PSI-CA and PSU-CA). This protocol's security is based on the famous DDH assumption. Since its publication, it has gained lots…

Cryptography and Security · Computer Science 2022-07-28 Yang Tan , Bo Lv
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