> On Sep 21, 2015, at 8:54 AM, Sixten Otto wrote:
>
> Especially given that recent versions of iOS can detect and decode QR codes
> automatically, much like face detection.
And Mac OS, too.
I just looked up some code I wrote a few months ago to do QR-code scanning.
Here’s the guts of it:
On Sep 21, 2015, at 11:54 AM, Sixten Otto wrote:
> On Sun, Sep 20, 2015 at 9:55 PM, Jens Alfke wrote:
>
>> But honestly, if you're going this route, it will be much faster to
>> transmit QR codes, since each code contains thousands of bits.
>>
>
> Especially given that recent versions of iOS
On Sun, Sep 20, 2015 at 9:55 PM, Jens Alfke wrote:
> But honestly, if you're going this route, it will be much faster to
> transmit QR codes, since each code contains thousands of bits.
>
Especially given that recent versions of iOS can detect and decode QR codes
automatically, much like face de
I don't think the ambient light sensor would be sensitive enough for this
anyway, so the camera is the right thing to use.
Look into the AVFoundation framework; it has some classes for setting up a
video feed from the camera and receiving frames. I believe there's sample code.
But honestly, if
After reading all of the replies, no one mentioned how to use iPhone to
detect the light changes (bright and dark) in codes, I just have no clue
how to make it works as long as I remember developers have no right to
access the light sensor, so I guess we have to use camera to achieve this,
but I ju
Do iOS devices support Trusted Computing in hardware? If so is it
accessible to userspace apps?
If so, you could store your phones secret in a write-only register.
For the profoundly paranoid, even the duplication of your storage
would not yield your phone's secret, The Bad Guy would need your
pe
The "over-the-shoulder" issue can be avoided using what is effectively a
Diffie-Hellman on top of QR codes. This can be done using front-facing cameras
on two devices placed face-to-face.
Sent from my iPhone
> On Sep 18, 2015, at 00:46, Pascal J. Bourguignon
> wrote:
>
>
>
>> On 17/09/15 1
I used to have a multi-factor authenticating door lock using this QR code
mechanism. The lock is powered by Raspberry Pi, and have a 128px by 64px
monochromatic screen, a camera and an RFID reader attached on it.
Procedure to unlock the door:
1. You swipe a RFID card across the lock. A QR code
Flashing the entire screen as I describe should not be done in product
(App Store) code, rather one might use it as a very, very rough
prototype.
I expect production-quality software could modulate the screen is
far-more subtle ways that both would transmit data far faster as well
as avoid stimula
On 17/09/15 17:32, Michael David Crawford wrote:
And what the man said: I myself experience seizures in which I lose
consciousness for as long as three weeks. Before they were diagnosed
I would experience seizures while driving my car then suddenly find
myself in unfamiliar places without any
Strictly speaking, light is the most common way that data is
transferred, in that the forces between electrically charged particles
are moderated by virtual photons. Other than light we have the
gravitational, strong nuclear and weak nuclear forces however it is
impractical to transmit much data b
Yes. How do you think TV remotes work?
They use IR transmitters/receivers.
They are, however, PAINFULLY SLOW.
When we were making FiOS TV, we had to create an app called FiOS Mobile Remote
for the iPhone that would control your FiOS set top box.
EVEN THOUGH the iPhone had to pipe its commands
> This toy can connect to the iphone's network by detecting the blinking
> screen of an iPhone. I wonder if it is possible that using this technique
> to transfer data.
Absolutely. Such techniques have been used for 150 years, using lamps or
reflected sunlight to send Morse-like codes to human o
On 17/09/15 07:06, Jens Alfke wrote:
On Sep 16, 2015, at 9:06 PM, Jonathan Hull 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 yo
> On Sep 16, 2015, at 9:06 PM, Jonathan Hull 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 t
This is how fibre optics work, so it is possible. In this case, you have to be
careful not to give people seizures by blinking at the wrong frequency.
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 optim
First of all, please take a look at this video:
https://www.youtube.com/watch?v=LPyLHhiGTHM
This toy can connect to the iphone's network by detecting the blinking
screen of an iPhone. I wonder if it is possible that using this technique
to transfer data.
For instance,
1. you have some data, and tr
17 matches
Mail list logo
