madelyne xiao
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madelyne.github.io
madelyne xiao
@madelyne.github.io
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Reposted by madelyne xiao
ccanonne.github.io
This is really cool: a flexible system, combining differential privacy and secure MPC to enable trend analysis on E2EE platforms (e.g., WhatsApp). Allows journalists to study the spread of misinformation, w/o compromising users' privacy.

arxiv.org/abs/2505.23880 by Xiao, Jain, Gorelick,& Scheffler
Our system, Synopsis, accomplishes this goal by enabling journalists to look for trends in message data without ever accessing individual texts or being in a position to leak information about them. This also gives platform users the ability to donate their data for the public good without exposing the contents of their messages. Journalists are able to write natural language queries and see counts of how many semantically similar messages, or whether that count has reached a threshold, are present in the donated corpus.
June 6, 2025 at 1:39 AM