Matthew Green
@matthewdgreen.bsky.social
18K followers 400 following 1.8K posts
I teach cryptography at Johns Hopkins. https://blog.cryptographyengineering.com
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Reposted by Matthew Green
cameronwilson.bsky.social
We're now finding out that as many as 70,000 people had their government IDs provided to prove their ages leaked by Discord. Like I wrote last week, this is an inherent risk (and made greater by a rushed process) of getting platforms to do age checks
Discord says 70,000 users may have had their government IDs leaked in breach
The ID pics had been submitted as part of age-related appeals.
www.theverge.com
Reposted by Matthew Green
kevinmkruse.bsky.social
Bray is a historian at Rutgers who received death threats after landing on Turning Points USA's Professor Watchlist. As a result, he announced he was moving to Europe. And then this happened.

This kind of harassment and abuse of scholars is Charlie Kirk's legacy and it's only getting worse.
mark-bray.bsky.social
“Someone” cancelled my family’s flight out of the country at the last second.

We got our boarding passes. We checked our bags. Went through security. Then at our gate our reservation ‘disappeared.’
Reposted by Matthew Green
kairyssdal.bsky.social
This is the lesson of 2025
qjurecic.bsky.social
he's going to come after you either way, so you might as well act with integrity
matthewdgreen.bsky.social
I hear that the EU ChatControl situation is going better today. I cannot believe how close the EU has gotten to passing this crazy regulation.
matthewdgreen.bsky.social
One where every commenter on the liberal blogs is not a hard-right Bush-era Republican.
Reposted by Matthew Green
matthewdgreen.bsky.social
If AI became quietly superintelligent in 2018 and began reorganizing our world to its purposes, would that look very different than what’s happening today?
matthewdgreen.bsky.social
Anything is possible to pull off if you’re willing to force someone to redesign their app, and you’re not concerned about security. Just force people to upload the texts to a server before they even get encrypted.
Reposted by Matthew Green
mmasnick.bsky.social
It's too long a story to explain how I know this, but I once found out that the FBI made challenge coins about how they tried to force Apple to break iPhone encryption. Challenge coins celebrating shitty behavior is deeply a part of FBI culture.
samd.bsky.social
reddit occupied government
Ken Dilanian
@DilanianMSNBC
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The challenge coins being handed out by @FBIDirectorKash. Seems someone put a lot of thought into this.
Reposted by Matthew Green
signal.org
We are alarmed by reports that Germany is on the verge of a catastrophic about-face, reversing its longstanding and principled opposition to the EU’s Chat Control proposal which, if passed, could spell the end of the right to privacy in Europe. signal.org/blog/pdfs/ge...
signal.org
matthewdgreen.bsky.social
Buy me a drink, sing me a song, take me as I am because I can’t stay long?
Reposted by Matthew Green
matthewdgreen.bsky.social
Doesn’t sound much like what the states require for age verification, but I guess that’s good?
matthewdgreen.bsky.social
These laws are never ever put to bed. One day you’ll be distracted and they’ll get one through.
matthewdgreen.bsky.social
They’ve been going after Meta too.
matthewdgreen.bsky.social
So BlueSky is blocked in Mississippi and requires age verification for “adult content” in SD, WY, OH and the UK. How accurate is their classification of adult content?
matthewdgreen.bsky.social
“AI expert” to a computer scientist: you’re working on optimizing model architectures and improving backprop.

“AI expert” for real: you’re gluing transformers together with Python and hoping you get better results.
matthewdgreen.bsky.social
My student pointed me to this paragraph in the Guardian’s “CoverDrop” white paper. Gagh we need more good software engineers to build libraries!
matthewdgreen.bsky.social
Would be a technical nightmare because now you’d have two versions of Apple encryption, where the security changes depending on where in the world you are (ie your IP address.) This is so dangerous that it’s tantamount to a global backdoor, including against US citizens.