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Christopher A. Choquette Choo

2 accepted papers

2026

Extracting alignment data in open models

ICML 2026poster

In this work, we show that it is possible to extract significant amounts of alignment training data from a post-trained model -- useful to steer the model to improve certain capabilities such as long-context reasoning, safety, instruction following, and maths. While the majority of related work on m…

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2022

The Fundamental Price of Secure Aggregation in Differentially Private Federated Learning

ICML 2022spotlight

We consider the problem of training a $d$ dimensional model with distributed differential privacy (DP) where secure aggregation (SecAgg) is used to ensure that the server only sees the noisy sum of $n$ model updates in every training round. Taking into account the constraints imposed by SecAgg, we c…