Comment by TheOtherHobbes
9 hours ago
Maybe I'm missing something, but this reads like a complicated way to say "We made an IR diode that gets cold as well as hot."
9 hours ago
Maybe I'm missing something, but this reads like a complicated way to say "We made an IR diode that gets cold as well as hot."
Or you can call it encryption along different axis. Much like extracting GPS signals from below thermal floor level - you can do it if you 1) know it's there, and 2) know exactly how to key in. It's impressive as heck, but you can always rephrase it in terms of information theory in ways that makes it sound like slightly different shade of mundane.
No, this has nothing whatsoever to do with encryption, and no real security, probably
Depends on how you modulate it. Think e.g. frequency hopping / spread spectrum: it's encryption, just done on modulation instead of transmitted data.
I think the reason the negative luminance is potentially important for secrecy is that it means the average of the signal you’re transmitting is zero, making it indistinguishable from noise.
I don't believe you're missing anything. This is just stegenography with a possibly new covert channel, right? Apparently the secret depends on advisaries not noticing the special hardware deployed on each end. Would using spread sprectum techniques would work just as well?
Yeah, but saying that doesn't get the military to give you money.
I would much rather have been called a computerologist than a computer scientist.
Yep.