Earlier this year, Apple hosted the Workshop on Privacy-Preserving Machine Learning (PPML). This virtual event brought Apple and members of the academic research communities together to discuss the state of the art in the field of privacy-preserving machine learning through a series of talks and discussions over two days.
During this workshop, Salil Vadhan presented on Widespread Underestimation of Sensitivity in DP Libraries.
https://machinelearning.apple.com/video/widespread-underestimation