Co-designing for Compliance: Multi-party Computation Protocols for Post-Market Fairness Monitoring in Algorithmic Hiring

Fuente: arXiv
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Auteurs principaux: He, Changyang, Baranowska, Nina, Castaneira, Josu Andoni Eguiluz, Escriba, Guillem, Juentgen, Matthias, Via, Anna, Borgesius, Frederik Zuiderveen, Biega, Asia
Format: Preprint
Publié: 2026
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author He, Changyang
Baranowska, Nina
Castaneira, Josu Andoni Eguiluz
Escriba, Guillem
Juentgen, Matthias
Via, Anna
Borgesius, Frederik Zuiderveen
Biega, Asia
author_facet He, Changyang
Baranowska, Nina
Castaneira, Josu Andoni Eguiluz
Escriba, Guillem
Juentgen, Matthias
Via, Anna
Borgesius, Frederik Zuiderveen
Biega, Asia
contents Post-market fairness monitoring is now mandated to ensure fairness and accountability for high-risk employment AI systems under emerging regulations such as the EU AI Act. However, effective fairness monitoring often requires access to sensitive personal data, which is subject to strict legal protections under data protection law. Multi-party computation (MPC) offers a promising technical foundation for compliant post-market fairness monitoring, enabling the secure computation of fairness metrics without revealing sensitive attributes. Despite growing technical interest, the operationalization of MPC-based fairness monitoring in real-world hiring contexts under concrete legal, industrial, and usability constraints remains unknown. This work addresses this gap through a co-design approach integrating technical, legal, and industrial expertise. We identify practical design requirements for MPC-based fairness monitoring, develop an end-to-end, legally compliant protocol spanning the full data lifecycle, and empirically validate it in a large-scale industrial setting. Our findings provide actionable design insights as well as legal and industrial implications for deploying MPC-based post-market fairness monitoring in algorithmic hiring systems.
format Preprint
id arxiv_https___arxiv_org_abs_2602_01837
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Co-designing for Compliance: Multi-party Computation Protocols for Post-Market Fairness Monitoring in Algorithmic Hiring
He, Changyang
Baranowska, Nina
Castaneira, Josu Andoni Eguiluz
Escriba, Guillem
Juentgen, Matthias
Via, Anna
Borgesius, Frederik Zuiderveen
Biega, Asia
Computers and Society
Cryptography and Security
Post-market fairness monitoring is now mandated to ensure fairness and accountability for high-risk employment AI systems under emerging regulations such as the EU AI Act. However, effective fairness monitoring often requires access to sensitive personal data, which is subject to strict legal protections under data protection law. Multi-party computation (MPC) offers a promising technical foundation for compliant post-market fairness monitoring, enabling the secure computation of fairness metrics without revealing sensitive attributes. Despite growing technical interest, the operationalization of MPC-based fairness monitoring in real-world hiring contexts under concrete legal, industrial, and usability constraints remains unknown. This work addresses this gap through a co-design approach integrating technical, legal, and industrial expertise. We identify practical design requirements for MPC-based fairness monitoring, develop an end-to-end, legally compliant protocol spanning the full data lifecycle, and empirically validate it in a large-scale industrial setting. Our findings provide actionable design insights as well as legal and industrial implications for deploying MPC-based post-market fairness monitoring in algorithmic hiring systems.
title Co-designing for Compliance: Multi-party Computation Protocols for Post-Market Fairness Monitoring in Algorithmic Hiring
topic Computers and Society
Cryptography and Security
url https://arxiv.org/abs/2602.01837