Had fun in at #OSSSummit in Tokyo yesterday demonstrating a TPM interposer attack obtaining the systemd cryptenroll boot keys

https://sched.co/1jKCe

And also explaining how the new Linux Kernel TPM patches can help defeat this

For those who asked, my python3 interposer designed to steal the keys is here:

https://git.kernel.org/pub/scm/linux/kernel/git/jejb/tpm2-interposer.git/

Thus is the video of my TPM interpose presentation and demo at #OSSummit

@n6utc that is the minimum number of antennas a vehicle should have

RE: https://mastodon.radio/@n6utc/113403164147476662

Just learned about gnome-kiosk (via the particleos repo): https://gitlab.gnome.org/GNOME/gnome-kiosk

Adding uchar.h to picolibc today. Instead of providing useful conversions between UTF-8, UTF-16 and UTF-32, all C23 provides is conversions between those and the awful "multibyte" representations. I can understand why they'd *also* want to connect UTF encodings to the legacy C APIs, but the most important thing we need is a way to validate UTF-8 input which has some pretty tricky corner cases involving missing bytes, overlong encodings, and surrogates. https://github.com/picolibc/picolibc/pull/861

Imagine the world today if Google did not kill blogging. Would it be different?

10 GHz beacon testing around Seattle on the weekend. Frank AG6QV (https://ag6qv.com/Blog/uhrc) was able to receive via reflection from Puget Sound ferries. Now thinking about a proper mobile-mounted setup for quick 2-way contacts.

https://youtube.com/shorts/n0ZXhANwGXc?feature=share

#hamradio #amateurradio #microwave

This is bonkers for 6m. It's at the low end of the old VHF analog television channels (#2 in many places).

@kc2ihx find a big stick

6m (50 MHz) FT8 over the past 15 minutes on pskreporter.info, strong TEP (transequatorial propagation)


#vhf #ft8 #hamradio #amateurradio #6m

@NanoRaptor what?!

@NanoRaptor @adafruit @Anneb average Australian car.

@NanoRaptor umm, you're half elf.

@timjclevenger Looks like a laundromat machine.

RE: https://infosec.exchange/@timjclevenger/113329259396802611

Some hours later, got it working. Using the PCB as the temperature sensor, with a k-type thermocouple.

Calibrating the PID controller of a DIY reflow hot plate. Mistakes were made.

The lack of threading here is diabolical.

@ftg @azonenberg @dlharmon I general, I cheat by not trying to use coax above 24 GHz, but I really should give it a go at 47 GHz one day. I'm thinking in terms of using spatial combiners though, all in waveguide, right from the device outputs. The detailed engineering needed to get excellent matches across coax to CPWG or microstrip is Officially Hard.

@g4dbn @DosFox I feel this. If AI & robots can't fix this, then what use are they?

Hi folks, I've just posted an edited version of one of the presentations I gave remotely at Microwave Update 2024 Vancouver. It's about some of the techniques I've been experimenting with for manufacturing antennas and feeds now I have a tame 5000-pound killer robot in my workshop, otherwise known as a SYIL X5 CNC mill.
https://youtu.be/ZDQyhEpxXmA
#radio #cnc #machining #microwave #mmWave