Matthew Green

Matthew Green

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Matthew Green is a cryptography expert and Johns Hopkins professor known for his work on applied cryptography, secure storage, and privacy-enhancing technologies.

Meta Drops Instagram DM End‑to‑end Encryption
SocialMar 13, 2026

Meta Drops Instagram DM End‑to‑end Encryption

Meta appears to be reversing its strong stance on encryption. The first obvious casualty is that they’re abandoning and disabling end-to-end encryption in Instagram DMs.

By Matthew Green
EU Advances Message Scanning, Yet Dark Timeline Persists
SocialMar 13, 2026

EU Advances Message Scanning, Yet Dark Timeline Persists

The EU seems to be going in the right direction when it comes to mass message scanning. Unfortunately, the fact that this vote was necessary proves that we’re still in the dark timeline. https://t.co/Tci3GoLsPg

By Matthew Green
TikTok Denies “Controversial” Tech, Actually Uses End‑to‑end Encryption
SocialMar 4, 2026

TikTok Denies “Controversial” Tech, Actually Uses End‑to‑end Encryption

TikTok announces that they’re not going to deploy “controversial privacy tech” that’s actually the same end-to-end encryption most other providers use to protect users’ DMs. https://t.co/INKzu9ku2z

By Matthew Green
Building Anonymous Credentials for Future Age Verification
SocialMar 2, 2026

Building Anonymous Credentials for Future Age Verification

New post on anonymous credentials and how to build them. All of this is in service on a longer future post on how these will fit into age verification systems. https://t.co/IqwlP9S6mv

By Matthew Green
Cloud Providers Can’t Certify TEE Key Secrecy
SocialFeb 27, 2026

Cloud Providers Can’t Certify TEE Key Secrecy

I heard an interesting anecdote about TEEs from some fintech people. They were trying to convince regulators that TEEs aren’t just “computers under their control”, so they asked cloud providers to certify that they’d never hand over the keys. Providers...

By Matthew Green
AI Finds FFmpeg Overflow; Patience Beats Complexity
SocialFeb 16, 2026

AI Finds FFmpeg Overflow; Patience Beats Complexity

My son showed me one of the overflow vulnerabilities found in FFmpeg by Google/Deepmind’s security AI agents. I was thinking about how hard these things are to find, and at least this one didn’t seem deep — just required enormous...

By Matthew Green
Matthew Green - Page 2 | Pulse