Matthew Green

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I teach cryptography at Johns Hopkins. https://blog.cryptographyengineering.com (#matthew_d_green on the other site.)
About meI teach cryptography at Johns Hopkins.
Boston. #meshcore
Right now it handles simulations that involve collisions, delays and other common events (in a very simple model). Each node is a simplified Meshcore node running as a process. #meshcore
Just to give some visuals. #meshcore
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
GitHub - matthewdgreen/meshcore_sim: Simulator for baby meshcore networks

Simulator for baby meshcore networks. Contribute to matthewdgreen/meshcore_sim development by creating an account on GitHub.

GitHub

A reference to the Clipper Chip (https://en.wikipedia.org/wiki/Clipper_chip) in “Memento Mori" (S4E14) from 1997.

The history of the Clipper Chip project is a fascinating story about the politics and history around strong #cryptography, #surveillance, and #privacy in the early 90s.

See the writing on this topic by @mattblaze (https://www.mattblaze.org/papers/escrow-acsac11.pdf) and @matthew_d_green (https://blog.cryptographyengineering.com/2015/07/20/a-history-of-backdoors/).

It is worth studying and for those who did not live through it.

#TheXFiles

Microsoft Gave FBI BitLocker Encryption Keys, Exposing Privacy Flaw

The tech giant said providing encryption keys was a standard response to a court order. But companies like Apple and Meta set up their systems so such a privacy violation isn’t possible.

Forbes
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.
PS I did a search to see if there are any public court documents talking about Private Relay, and the closest I found is one CSAM case involving a defendant who used Private Relay, but was caught due to logging into an Adobe service. https://insidelake.com/2023/08/11/geek-squad-manager-arrested-on-more-than-30-charges-involving-child-pornography/
Geek Squad Manager Arrested on more than 30 Charges Involving Child Pornography - Inside Lake

FRUITLAND PARK, Florida—A Fruitland Park man is facing more two dozen counts of possession of child pornography and six counts of transmitting pornography after a search warrant revealed numerous images in his Adobe account, according to a probable cause affidavit. Acting on a tip from the National Center for Missing & Exploited Children (NCMEC,) Fruitland Park Police Department began investigating a report that eight images of child pornography were uploaded to an Adobe account belonging to David Michael Frisby, 37, on Dec. 18, 2022. A search warrant revealed 571 photos in his account including the eight photos that began the […]

Inside Lake

I’m fascinated by these services for a reason: this is the first time that major companies have taken a stand on adding IP privacy to their offerings. It’s as big a deal as the rise of end-to-end encryption or TLS, but everyone noticed those things. Nobody is talking about this.

Also, what makes IP hiding services feasible today is the economics of the thing. With peering agreements and the extremely low bandwidth costs big tech cos can access, using 50GB/mo of Private Relay probably costs less than $1 in ingress/egress charges. Apple charges $1-10.

Anyway, the current usage for both systems is web browsing (although Google seems to have given up on that.) But companies are also using this to add privacy to their own internal services, presumably things like Find My and (maybe) Siri and Apple’s PCC or Google’s new private ML inference service. https://blog.google/technology/ai/google-private-ai-compute/
Private AI Compute: our next step in building private and helpful AI

Introducing Private AI Compute, our new way to bring you helpful AI with the power of the cloud, while keeping your data private to you.

Google