I’ve been working on a little simulator for MeshCore, written entirely using Claude Code. I was hoping some MeshCore devs might take a look and let me know if there are features they could use. https://github.com/matthewdgreen/meshcore_sim #meshcore
Matthew Green
@matthew_d_green@ioc.exchange
mastodon
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I teach cryptography at Johns Hopkins. https://blog.cryptographyengineering.com (#matthew_d_green on the other site.)
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About me:
I teach cryptography at Johns Hopkins.
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Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
@matthew_d_green@ioc.exchange
·
Mar 23, 2026
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Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
@matthew_d_green@ioc.exchange
·
Jan 23, 2026
Microsoft is handing over Bitlocker keys to law enforcement. https://www.forbes.com/sites/thomasbrewster/2026/01/22/microsoft-gave-fbi-keys-to-unlock-bitlocker-encrypted-data/
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Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
@matthew_d_green@ioc.exchange
·
Dec 25, 2025
I was stupid enough to buy this new AppleCare One plan for a phone I bought my daughter. Now I learn this only covers the device if it’s connected to the same Apple ID (not family plan). Have to spend Christmas unwinding this and getting a refund, what a drag.
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Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
@matthew_d_green@ioc.exchange
·
Oct 10, 2025
And from a pure privacy perspective, the problem there is that once you’ve demanded every encrypted app add a scanning component, then changing what you scan for is just a software update to be agreed upon quietly in some committee down the line.
View full thread on ioc.exchange
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Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
@matthew_d_green@ioc.exchange
·
Oct 10, 2025
So what worries me come December is that we see a bunch of “moderated” proposals that preserve this central architectural change, but just use it for slightly less. That’s not going to save anyone.
View full thread on ioc.exchange
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Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
@matthew_d_green@ioc.exchange
·
Oct 10, 2025
The problem with this idea is that most “moderated” versions don’t solve the central problem: you’re changing private, encrypted messengers to have a component that scans the plaintext of the message. This is what potential makes your messages vulnerable to theft.
View full thread on ioc.exchange
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Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
@matthew_d_green@ioc.exchange
·
Oct 10, 2025
Germany has agreed to stop ChatControl for now, due to huge amounts of public pressure. Good job! The bad news is that it could come back as soon as December, and the German government has interpreted the feedback as a need to “moderate” the proposal.
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Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
@matthew_d_green@ioc.exchange
·
Oct 20, 2023
I feel like we should introduce this to our CS students during their first year.
“How to control the adoption rate of a feature based on where you place it in the Settings menu-tree.”
View full thread on ioc.exchange
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Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
@matthew_d_green@ioc.exchange
·
Oct 20, 2023
Anytime someone sets a feature as a non-default, I assume 95% of users never touch it. When they put it under the “Privacy” settings menu, I raise my expectation to 99%.
But Privacy -> Settings -> Advanced, wow. That’s like putting it in a disused lavatory in the basement of the town hall, with a sign that says “Beware of Tiger.”
View full thread on ioc.exchange
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Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
@matthew_d_green@ioc.exchange
·
Oct 20, 2023
Ok the option to turn it off is tucked away under Privacy -> Advanced but it warns you that you might experience painful side-effects if you turn it on.
View full thread on ioc.exchange
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Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
@matthew_d_green@ioc.exchange
·
Oct 20, 2023
I actually didn’t realize that Signal leaked my IP address to contacts when I initiated a call.
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Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
@matthew_d_green@ioc.exchange
·
Feb 20, 2023
Is there a ChatGPT IDE plugin that just adds comments to code?
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Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
@matthew_d_green@ioc.exchange
·
Dec 20, 2022
@baro77 They said shared albums aren’t supported. As a special exception.
View full thread on ioc.exchange
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Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
@matthew_d_green@ioc.exchange
·
Dec 20, 2022
@baro77 Yeah looks like 16.2 and Ventura. And any devices that don’t support those newer updates have to be removed entirely. They can’t participate at all.
View full thread on ioc.exchange
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Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
@matthew_d_green@ioc.exchange
·
Dec 20, 2022
Also had to update a MacBook Air, which was messy. Even after the update ADP on my phone refused to acknowledge the Mac was up-to-date. Activating ADP on the Mac was possible, but failed mysteriously several times.
View full thread on ioc.exchange
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Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
@matthew_d_green@ioc.exchange
·
Dec 20, 2022
These criticisms are mostly UX nits, but I had to remove a bunch of old devices with names like “Matthew’s iPad (3)” that have probably been gathering dust in a closet. I think that’s ok but was a little nervous I might nuke a device my kids were using.
View full thread on ioc.exchange
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Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
Matthew Green
@matthew_d_green@ioc.exchange
I teach cryptography at Johns Hopkins. https:// blog.cryptographyengineering.c om (#matthew_d_green on the other site.)
ioc.exchange
@matthew_d_green@ioc.exchange
·
Dec 20, 2022
Apple’s Advanced Data Protection isn’t too hard to activate, but the experience is a little clunky. Particularly the need to remove older devices from iCloud.
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