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20232026
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cs.CR2025

VaultGemma: A Differentially Private Gemma Model

Amer Sinha, Thomas Mesnard, Ryan McKenna +18

We introduce VaultGemma 1B, a 1 billion parameter model within the Gemma family, fully trained with differential privacy. Pretrained on the identical data mixture used for the Gemm…

cs.CR2025

Private Hyperparameter Tuning with Ex-Post Guarantee

Badih Ghazi, Pritish Kamath, Alexander Knop +3

The conventional approach in differential privacy (DP) literature formulates the privacy-utility trade-off with a "privacy-first" perspective: for a predetermined level of privacy,…

cs.CR2024

On the Differential Privacy and Interactivity of Privacy Sandbox Reports

Badih Ghazi, Charlie Harrison, Arpana Hosabettu +8

The Privacy Sandbox initiative from Google includes APIs for enabling privacy-preserving advertising functionalities as part of the effort around limiting third-party cookies. In p…

cs.CR2024

Differential Privacy on Trust Graphs

Badih Ghazi, Ravi Kumar, Pasin Manurangsi +1

We study differential privacy (DP) in a multi-party setting where each party only trusts a (known) subset of the other parties with its data. Specifically, given a trust graph wher…

cs.CR2024

Unlearn and Burn: Adversarial Machine Unlearning Requests Destroy Model Accuracy

Yangsibo Huang, Daogao Liu, Lynn Chua +7

Machine unlearning algorithms, designed for selective removal of training data from models, have emerged as a promising approach to growing privacy concerns. In this work, we expos…

cs.CR2023

Summary Reports Optimization in the Privacy Sandbox Attribution Reporting API

Hidayet Aksu, Badih Ghazi, Pritish Kamath +4

The Privacy Sandbox Attribution Reporting API has been recently deployed by Google Chrome to support the basic advertising functionality of attribution reporting (aka conversion me…