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2024/1445 (PDF) Last updated: 2024-11-25
Another Walk for Monchi
Riccardo Taiello, Emre Tosun, Alberto Ibarrondo, Hervé Chabanne, Melek Önen
Cryptographic protocols

Monchi is a new protocol aimed at privacy-preserving biometric identification. It begins with scores computation in the encrypted domain thanks to homomorphic encryption and ends with comparisons of these scores to a given threshold with function secret sharing. We here study the integration in that context of scores computation techniques recently introduced by Bassit et al. that eliminate homomorphic multiplications by replacing them by lookup tables. First, we extend this lookup tables...

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