Somewhere a phreaker is rejoicing
Quietnet: Chat client that works over near-ultrasonic sound
41–50 of 66 posts
Re: Quietnet: Chat client that works over near-ultrasonic sound
#42Just installed and tried all the necessary packages, but for some reason it simply doesn't work. Here's a screenshot: http://cl.ly/image/180b0k3X332g I'm using a retina macbook pro 15 inches
Tried again, this time I get an 'o'. http://cl.ly/image/0e1A2c2i1Y16
It's definitely a toy and a bit dodgy. I wrote up some instructions over here: https://github.com/Katee/quietnet/issues/3#issuecomment-3187...
Basically I only every worked on this until it was at the point where it was working for me on the laptops I was using, it's definitely not robust.
Re: Quietnet: Chat client that works over near-ultrasonic sound
#43Earlier quoted context omitted.
Tried again, this time I get an 'o'. http://cl.ly/image/0e1A2c2i1Y16
Are you sending and receiving on the same computer? I feel like that might cause issues. Are you able to use two separate computers to test?
It actually works much better when sending an receiving on the same computer. It's not as fun though.
Re: Quietnet: Chat client that works over near-ultrasonic sound
#44Interesting... I thought the consensus was that these sounds weren't possible to create / detect on typical hardware according to recent discussions about mystery malware spreading through the air? I wonder what percentage of systems would be up to the required specs.
Malware can't spread via ultrasound, but it could certainly communicate via ultrasound. To spread would require that a sound picked up by the microphone would be executable, and in general, that can't happen. (In specific it can, of course; one could build a program to execute things from the microphone on purpose. But generally microphones do not get their input executed, and any hardware that did that would be incr…
Microphone injection reminds of the picture going around with the person who taped a sql injection attack over their license plate to screw with the traffic cams.
Re: Quietnet: Chat client that works over near-ultrasonic sound
#45Earlier quoted context omitted.
No, but the more sounds you use, the more precise everything has to be. Just think of a machine that recognizes blue, red, and yellow as compared to a machine that recognizes all 24-bit colors. Aside from everything else, how on earth would you calibrate the sensor?
You could do something like keep the frequency offset between keys constant for all keyboards, but add some way of shifting the frequency of all of the keys by the same amount. It seems feasible to me, but I have no expertise in the area. The difficulty could prohibit an infinite set of configurations, but it could easily allow for a small set of configurations for cases when a few keyboards are in close proximity.
It would be trivial to use the same synth hardware and warp the oscillator that drives the overall synth by a couple ppm higher or lower.
It would be a lot easier to encode at the message layer.
You are all talking around a FDMA spread spectrum implementation and I'm saying a CDMA would be a lot simpler to implement...
Re: Quietnet: Chat client that works over near-ultrasonic sound
#46Earlier quoted context omitted.
You could do something like keep the frequency offset between keys constant for all keyboards, but add some way of shifting the frequency of all of the keys by the same amount. It seems feasible to me, but I have no expertise in the area. The difficulty could prohibit an infinite set of configurations, but it could easily allow for a small set of configurations for cases when a few keyboards are in close proximity.
It would be trivial to use the same synth hardware and warp the oscillator that drives the overall synth by a couple ppm higher or lower. It would be a lot easier to encode at the message layer. You are all talking around a FDMA spread spectrum implementation and I'm saying a CDMA would be a lot simpler to implement...
CDMA? Are we still talking about unpowered keyboards that send keypresses with the audible sound of the key striking the board?
CDMA is a neat scheme, but a single mechanical keypress generating a series of bits (at least 8) sounds awfully complex.
Re: Quietnet: Chat client that works over near-ultrasonic sound
#47Earlier quoted context omitted.
Malware can't spread via ultrasound, but it could certainly communicate via ultrasound. To spread would require that a sound picked up by the microphone would be executable, and in general, that can't happen. (In specific it can, of course; one could build a program to execute things from the microphone on purpose. But generally microphones do not get their input executed, and any hardware that did that would be incr…
Microphone injection reminds of the picture going around with the person who taped a sql injection attack over their license plate to screw with the traffic cams.
Re: Quietnet: Chat client that works over near-ultrasonic sound
#48Has anyone tried using this around their dogs? I don't want to dos my puppy. :(
I can say my cats are fine... :)
Re: Quietnet: Chat client that works over near-ultrasonic sound
#49A webapp using the Web Audio API adopting the same sort of approach: http://smus.com/ultrasonic-networking/
Re: Quietnet: Chat client that works over near-ultrasonic sound
#50Interesting... I thought the consensus was that these sounds weren't possible to create / detect on typical hardware according to recent discussions about mystery malware spreading through the air? I wonder what percentage of systems would be up to the required specs.
Malware can't spread via ultrasound, but it could certainly communicate via ultrasound. To spread would require that a sound picked up by the microphone would be executable, and in general, that can't happen. (In specific it can, of course; one could build a program to execute things from the microphone on purpose. But generally microphones do not get their input executed, and any hardware that did that would be incr…
> In specific it can, of course
Buffer overflow in the microphone driver? I'd love to see that in a Hollywood movie.