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Matthew Green

Matthew Green

Cryptography professor, Johns Hopkins University

Appears in 1 story

Notable Quotes

"If we judge XChat as an end-to-end encryption scheme, this seems like a pretty game-over type of vulnerability." — Blog post, June 2025

"For the moment, until it gets a full audit by someone reputable, I would not trust this any more than I trust current unencrypted DMs." — To TechCrunch

Stories

X builds toward a Western super app, one standalone product at a time

New Capabilities

Leading academic critic of XChat's encryption architecture

Elon Musk spent $44 billion to buy Twitter in October 2022, telling investors it was "an accelerant to creating X, the everything app." Three and a half years later, that app is taking shape. On April 17, 2026, X released XChat, a standalone end-to-end encrypted messaging app for iPhone and iPad—the clearest signal yet that X is serious about unbundling its platform into a suite of interconnected services modeled on China's WeChat.

Updated 5 hours ago