Holding Secrets Accountable: Auditing Privacy-Preserving Machine Learning
CoRR(2024)
摘要
Recent advancements in privacy-preserving machine learning are paving the way
to extend the benefits of ML to highly sensitive data that, until now, have
been hard to utilize due to privacy concerns and regulatory constraints.
Simultaneously, there is a growing emphasis on enhancing the transparency and
accountability of machine learning, including the ability to audit ML
deployments. While ML auditing and PPML have both been the subjects of
intensive research, they have predominately been examined in isolation.
However, their combination is becoming increasingly important. In this work, we
introduce Arc, an MPC framework for auditing privacy-preserving machine
learning. At the core of our framework is a new protocol for efficiently
verifying MPC inputs against succinct commitments at scale. We evaluate the
performance of our framework when instantiated with our consistency protocol
and compare it to hashing-based and homomorphic-commitment-based approaches,
demonstrating that it is up to 10^4x faster and up to 10^6x more concise.
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