Share this page!

Matthew Green Profile picture
Twitter logo
14 Jun, 4 tweets, 1 min read
My wife has upgraded both dogs to have a Tile and an Airtag each. I think she’s worried about lack of Android support?
Our dogs are each dragging around enough microprocessor hardware to land the Apollo missions. Image
For scale: these are not large dogs. Image
Can’t lose your dog when they’re wearing too much gear to cross the lawn.

• • •

Missing some Tweet in this thread? You can try to force a refresh
　

Keep Current with Matthew Green

Matthew Green Profile picture

Stay in touch and get notified when new unrolls are available from this author!

Read all threads

This Thread may be Removed Anytime!

PDF

Twitter may remove this content at anytime! Save it as PDF for later use!

Try unrolling a thread yourself!

how to unroll video
  1. Follow @ThreadReaderApp to mention us!

  2. From a Twitter thread mention us with a keyword "unroll"
@threadreaderapp unroll

Practice here first or read more on our help page!

More from @matthew_d_green

Matthew Green Profile picture
16 Jun
This is an amazing paper. It implies (with strong statistical evidence) that the design of a major mobile-data encryption algorithm — used in GPRS data — was deliberately backdoored by its designer. eprint.iacr.org/2021/819
The GPRS standards were extensions to the GSM (2G/3G) mobile standard that allowed phones to use data over cellular networks. This was before LTE. For security, the standards included encryption to provide over-the-air security for your data. 2/
As is “normal” for telephony standards, the encryption was provided by two custom ciphers: GEA-1 and GEA-2. While there were strong export control regulations in place for crypto, there’s little overt indication that either of these ciphers was deliberately weakened. 3/
Read 14 tweets
Matthew Green Profile picture
14 Jun
We appear to be in the “try to force it into Gmail” lifecycle phase of Google’s latest chat app.
This will be followed by two name changes and removal from Gmail, before Google kills it and we start the cycle over in about 18 months.
What even is this. Image
Read 4 tweets
Matthew Green Profile picture
12 Jun
Reporters: when Apple says it hands over “metadata”, ask them what the hell that means.
Every time you start an iMessage conversation with someone, Apple logs the phone number. That’s “metadata”.

Did Apple turn that metadata over in this case?
Ok, following some research. It appears there are three orders that courts/law enforcement can use to obtain metadata. This is complex. Sheesh. 1/
Read 12 tweets
Matthew Green Profile picture
12 Jun
This is where we’re at. The responsibility for fighting surveillance abuse falls to tech companies, because nobody even pretends that the Federal government and courts are functional moral actors.
I have to assume that right now Apple and other tech companies are developing procedures to identify subpoenas that are aimed at Congress, on the assumption that the DoJ can’t be trusted to tell them.
“Well, we only handed over metadata, not content.”

You handed over a list that could contain every phone number House Intelligence Committee members ever spoke to or texted with, and you think that makes it ok?
Read 4 tweets
Matthew Green Profile picture
11 Jun
“But iMessage is end-to-end encrypted!”
Also I think it’s amazing that in five years we’ve gone from “if you haven’t committed a crime you don’t need encryption” to “US opposition lawmakers have their texts searched.”
Quick reminder: Apple could fix this in a heartbeat by adding an “end to end encryption for iCloud backup” setting (the tech is already in place), but they don’t. Even for those who want it.
Read 7 tweets
Matthew Green Profile picture
9 Jun
Oh wow, how did I miss this one. Tricking browsers into uploading their secret cookies to FTP sites, because the two servers share a TLS certificate.
Really in-the-weeds technical discussion of mitigations by @FiloSottile.
I’m going to forget about TLS here for a moment, and point out that the best way to mitigate a lot of these attacks is just to replace cookies entirely.
Read 4 tweets

Did Thread Reader help you today?

Support us! We are indie developers!

This site is made by just two indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member ($3/month or $30/year) and get exclusive features!

Become Premium

Too expensive? Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal Become our Patreon

Thank you for your support!

Follow Us on Twitter!

Like this author's thread?

Get emails when @matthew_d_green has new unrolls!

Check out other threads from @matthew_d_green!

Read all threads by @matthew_d_green

:(