Ring Glitch ℍ⊗ℌ
ring-glitch.bsky.social
Ring Glitch ℍ⊗ℌ
@ring-glitch.bsky.social
Cryptography. Privacy. Embedded/radio/firmware developer dealing with all its snafu.

* cr_mode@twatter
* https://ioc.exchange/@cr_mode on Mastodon
Exploring tracking persons via Wifi which is apparently not so uncommon now. With 2 ESP32 you can get person/movement tracking (ideal to change antennas though).

Responds to movement. Results heavily affected by Wifis around, needs more configuration.
August 19, 2025 at 11:04 PM
Needed something faster than classic USB3 HDD, bought Kindstion 2 TB SSD, found out that the 1 TB serial write backup takes 3h35 min on HDD, 1h44 min on SSD.

Because they slow dowwn heat up ater writing more than ~200 GB slow down 10x (mesured pure write operations)

So...coolinh maybe?
August 1, 2025 at 12:58 AM
Interesting paper on how to use EM emanations to detect hidden cameras by their power signature, like Chipwhisperer side channels, just in radio

www.usenix.org/conference/u...
March 30, 2025 at 8:21 PM
Trying out TEMPEST attacks, it's work to set up parameters right, 5th harmonic of pixelclock seems to work best.

I'd also want to try deep-tempest, but gnuradio is always laggy and breaks. deep-tempest requires learning anyway.

Examples: orig screen, tempest view via SDR and a high-contrast sniff
March 23, 2025 at 7:44 PM
February 13, 2025 at 6:15 PM
We found two military radio stations from 1984 and charged one of those batteries (one station's baterries still worked), other was on laboratory source.

BUT we were able to use both 1984 eastern military stations to talk to each other (44-53 MHz), used RTL-SDR to eavesdrop on the signal using NFM
February 6, 2025 at 7:52 AM
Older setup of LTE on bladeRF, required custom sysmocom SIM card to have correct Ki, Opc.
Didn't get to 5G yet since it would be more of "the same", already spent lot of time on getting this working, especially due to Pluto SDR bug(s) where I tried it before.
February 6, 2025 at 7:48 AM