Matthew Green
@matthewdgreen.bsky.social
I teach cryptography at Johns Hopkins. https://blog.cryptographyengineering.com
Imagine how bad things are going to be when these morons actually stumble into AI.
November 8, 2025 at 12:04 AM
Imagine how bad things are going to be when these morons actually stumble into AI.
I remain not panicked about side channel attacks.
November 2, 2025 at 9:46 PM
I remain not panicked about side channel attacks.
Wow hardcover books have become luxury items all of a sudden.
November 2, 2025 at 4:20 PM
Wow hardcover books have become luxury items all of a sudden.
Not to brag, but I’m a two time Test of Time winner now. Ok I’m bragging.
October 29, 2025 at 8:13 PM
Not to brag, but I’m a two time Test of Time winner now. Ok I’m bragging.
I don’t know why the conversation cuts off, but I got really far down the rabbit hole.
October 22, 2025 at 9:04 PM
I don’t know why the conversation cuts off, but I got really far down the rabbit hole.
A little baffled by European hotel room doors. Isn’t there supposed to be a lock here? Instead there’s a little button that says “privacy”. What does that do?
October 22, 2025 at 9:00 PM
A little baffled by European hotel room doors. Isn’t there supposed to be a lock here? Instead there’s a little button that says “privacy”. What does that do?
Southwest’s new coffee stirrers could have maybe used some workshopping.
October 20, 2025 at 12:41 AM
Southwest’s new coffee stirrers could have maybe used some workshopping.
Most of that tech stuff is already well under way. Several states already let you bind your driver’s license to your phone, for purposes that are (at present) entirely unconvincing. The interesting “hard” problems are all around privacy and fraud-resistance.
October 15, 2025 at 3:14 PM
Most of that tech stuff is already well under way. Several states already let you bind your driver’s license to your phone, for purposes that are (at present) entirely unconvincing. The interesting “hard” problems are all around privacy and fraud-resistance.
My student pointed me to this paragraph in the Guardian’s “CoverDrop” white paper. Gagh we need more good software engineers to build libraries!
October 1, 2025 at 6:16 PM
My student pointed me to this paragraph in the Guardian’s “CoverDrop” white paper. Gagh we need more good software engineers to build libraries!
It has the function of refreshing and refreshing.
September 27, 2025 at 11:29 PM
It has the function of refreshing and refreshing.
You know you’re having a day when
September 26, 2025 at 11:57 PM
You know you’re having a day when
There are pictures and they do indeed look pretty serious.
September 23, 2025 at 1:15 PM
There are pictures and they do indeed look pretty serious.
I’m struggling to understand what exactly is going on here. In another administration this would be a big story and we’d be talking about it. In this one I bet it’ll disappear.
September 23, 2025 at 1:13 PM
I’m struggling to understand what exactly is going on here. In another administration this would be a big story and we’d be talking about it. In this one I bet it’ll disappear.
What’s happening on my X timeline tonight 😂
September 22, 2025 at 11:09 PM
What’s happening on my X timeline tonight 😂
Ok here is a rendering.
September 19, 2025 at 4:51 PM
Ok here is a rendering.
So I’ve complained about JHU’s academic freedom statement, which is fine, but also looks like someone banged it out in 5 minutes using the default font in Google Docs. And I’ve thought about just reformatting it with a better font. But what if we went… bigger?
September 19, 2025 at 2:19 AM
So I’ve complained about JHU’s academic freedom statement, which is fine, but also looks like someone banged it out in 5 minutes using the default font in Google Docs. And I’ve thought about just reformatting it with a better font. But what if we went… bigger?
I’d been looking for this old sci-fi humor story about a guy who colonizes a planet, then the nations of Earth send spies to keep tabs on him, at which point they have to send more spies to keep tabs on them. Found it: it’s “Citizen in Space” by Robert Sheckley. www.dropbox.com/scl/fi/jukk3...
September 12, 2025 at 9:33 PM
I’d been looking for this old sci-fi humor story about a guy who colonizes a planet, then the nations of Earth send spies to keep tabs on him, at which point they have to send more spies to keep tabs on them. Found it: it’s “Citizen in Space” by Robert Sheckley. www.dropbox.com/scl/fi/jukk3...
Maybe I shouldn’t end this paragraph quite like this.
September 11, 2025 at 11:41 PM
Maybe I shouldn’t end this paragraph quite like this.
But then I couldn’t set up my seat like this.
September 11, 2025 at 4:56 PM
But then I couldn’t set up my seat like this.
The main experience I’ve had with Waymo in SF is that it tells you 2 minutes, then inevitably announces that suddenly it’ll be 10 minutes.
September 11, 2025 at 4:44 PM
The main experience I’ve had with Waymo in SF is that it tells you 2 minutes, then inevitably announces that suddenly it’ll be 10 minutes.
Eg the entire Substack crew.
September 5, 2025 at 7:30 PM
Eg the entire Substack crew.
Anyway I was on the east side of Manhattan and I was shocked that Brooklyn also has am identical Domino Sugar factory but I checked and theirs is full of knowledge workers using ChatGPT like a normal American city.
September 1, 2025 at 6:42 PM
Anyway I was on the east side of Manhattan and I was shocked that Brooklyn also has am identical Domino Sugar factory but I checked and theirs is full of knowledge workers using ChatGPT like a normal American city.