4 ms·
Cool technology, bad problem. I fully agree getting more distance is problematic. Not even in the sense of getting your data stolen, but also to allow pro activ
by andi999 4y ago
Cool technology, bad problem. I fully agree getting more distance is problematic. Not even in the sense of getting your data stolen, but also to allow pro active payment. I mean you want the customer to do an action (holding the card close to a device which shows the amount deducted) to conclusively agree to that payment. Not the cashier presses a button, and anybody too close pays for it.
- jiveturkey 4y agomodem/phone couplers, anyone?
- andi999 4y agoPhone carriers cut off the frequency spectrum.
- jiveturkey 4y agoi'm just referring to the acoustic isolation from the mechanical coupler. obviously (?) the passband for telephone comms is far short of ultrasonic
- andi999 4y agoWhat do you mean by acoustic isolation?
- jiveturkey 4y agohttps://en.wikipedia.org/wiki/Acoustic_coupler https://en.wikipedia.org/wiki/Acoustic_coupler
- andi999 4y agoYes, but what can ultrasonic do here?
- jiveturkey 4y agoThe complaint was that the wrong payment can be made, because audio leaks.
- andi999 4y agoyes. Now I understand, but then the stated advantage of longer distance is also gone...