Re: Is it possible to transfer data by using light
Re: Is it possible to transfer data by using light
- Subject: Re: Is it possible to transfer data by using light
- From: Jens Alfke <email@hidden>
- Date: Wed, 16 Sep 2015 22:06:26 -0700
> On Sep 16, 2015, at 9:06 PM, Jonathan Hull <email@hidden> wrote:
>
> The big question would be why you want to do it. It is most likely easier to transfer via wifi (also traveling at the speed of light, and optimized for data transfer) or bluetooth.
Secure pairing, as you said, is one use. You need to ensure that the two devices involved are exactly the ones you think they are, and WiFi or Bluetooth don’t work because they see everything in range.
But it’s much higher bandwidth to use something like a QR code, where you can send several thousand bits simultaneously. It’s pretty easy to send and receive QR codes using APIs already available in iOS and Mac OS. You can send an entire cryptographic key, and use that to bootstrap secure communication over traditional networking.
—Jens
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