Tetrad: Actively Secure 4PC for Secure Training and Inference

• URL: http://arxiv.org/abs/2106.02850v2
• Date: Tue, 8 Jun 2021 07:48:39 GMT
• Title: Tetrad: Actively Secure 4PC for Secure Training and Inference
• Authors: Nishat Koti, Arpita Patra, Rahul Rachuri, Ajith Suresh
• Abstract summary: Tetrad is a mixed-protocol framework for privacy-preserving machine learning. Fair multiplication protocol requires communicating only 5 ring elements improving over the state-of-the-art protocol of Trident. Fair framework is tested with benchmarks for deep neural networks such as LeNet and VGG16.
• Score: 14.318471874603212
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: In this work, we design an efficient mixed-protocol framework, Tetrad, with applications to privacy-preserving machine learning. It is designed for the four-party setting with at most one active corruption and supports rings. Our fair multiplication protocol requires communicating only 5 ring elements improving over the state-of-the-art protocol of Trident (Chaudhari et al. NDSS'20). The technical highlights of Tetrad include efficient (a) truncation without any overhead, (b) multi-input multiplication protocols for arithmetic and boolean worlds, (c) garbled-world, tailor-made for the mixed-protocol framework, and (d) conversion mechanisms to switch between the computation styles. The fair framework is also extended to provide robustness without inflating the costs. The competence of Tetrad is tested with benchmarks for deep neural networks such as LeNet and VGG16 and support vector machines. One variant of our framework aims at minimizing the execution time, while the other focuses on the monetary cost. We observe improvements up to 6x over Trident across these parameters.

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