Dynamic QR code

[Deep_Level_Shark]

Can anyone please help me to understand Dynamic QR code concept.

 

It is said that in Dynamic QR code , content changes......Does that mean the QR image that I see on screen is also changes ?  or  that QR image remains fixed but content changes ?

 

[adrynalyne]

  On 04/05/2019 at 15:55, Deep_Level_Shark said:

Can anyone please help me to understand Dynamic QR code concept.

 

It is said that in Dynamic QR code , content changes......Does that mean the QR image that I see on screen is also changes ?  or  that QR image remains fixed but content changes ?

 

Expand  

 Not familiar with it but if the content changes, so does the image. The only way around that would be linking to a webpage and *that* content changes. 

[Nick H. Supervisor]

I'm not entirely sure what you're referring to, but I can tell you that when using Google Authenticator and trying to pair it using MobileID the QR code changes every so often (every minute, perhaps).

 

So my answer would be that the QR code changes, not the content.

[adrynalyne]

  On 04/05/2019 at 16:34, Nick H. said:

I'm not entirely sure what you're referring to, but I can tell you that when using Google Authenticator and trying to pair it using MobileID the QR code changes every so often (every minute, perhaps).

 

So my answer would be that the QR code changes, not the content.

Expand  

The content changes too. The content is used to form the image. 

[Nick H. Supervisor]

  On 04/05/2019 at 16:35, adrynalyne said:

The content changes too. The content is used to form the image. 

Expand  

Fair enough. As I said, I wasn't entirely sure about the question being asked. What would "content" be? The content of the QR code? I would have thought that was static?

[adrynalyne]

  On 04/05/2019 at 16:44, Nick H. said:

Fair enough. As I said, I wasn't entirely sure about the question being asked. What would "content" be? The content of the QR code? I would have thought that was static?

Expand  

Yeah that’s what I figured too. Unless it links to a webpage with the same url and it’s content changes. I would think it needs to be to do that. 

[+Nik Louch Subscriber²]

I'm guessing its a QR code that links to a redirector that can change where it redirects?

So the image never changes, it points to the same place, but that's just an intermediary step that forwards the client to the end result.  The intermediary step is what can be changed.

 

https://blog.qrstuff.com/2012/08/12/dynamic-qr-codes

Turns out, I'm basically correct.

[Deep_Level_Shark]

  On 04/05/2019 at 17:10, Human.Online said:

I'm guessing its a QR code that links to a redirector that can change where it redirects?

So the image never changes, it points to the same place, but that's just an intermediary step that forwards the client to the end result.  The intermediary step is what can be changed.

 

https://blog.qrstuff.com/2012/08/12/dynamic-qr-codes

Turns out, I'm basically correct.

Expand  

Okay.  image never changes then....fine. 

 

so when you use a scanner to read this QR code , your scanner device will show you same content every time ?  yes/no ?

 

( scanner device cant redirect)

 

I'm still confused.

Edited May 4, 2019 by Deep_Level_Shark

[adrynalyne]

  On 04/05/2019 at 17:49, Deep_Level_Shark said:

Okay.  image never changes then....fine. 

 

so when you use a scanner to read this QR code , what your scanner device will show to you ? Does it show  a URL as content from this QR code ?

 

I'm still confused.

Expand  

It shows a url that redirects to whatever. QR codes only show what they are encoded to show. They cannot show anything else without changing the image. You can change where the url goes to though. 

 

Example. I have a redirect called foo.com. I make a QR code. It points to foo.com. Foo.com this week redirects to google.com. Next week, I’ll change it to redirect to bing.com. Foo.com didn’t change, so the image didn’t change. 

[firey]

  On 04/05/2019 at 17:49, Deep_Level_Shark said:

Okay.  image never changes then....fine. 

 

so when you use a scanner to read this QR code , what your scanner device will show to you ? Does it show  a URL as content from this QR code ?

 

I'm still confused.

Expand  

The URL that's in the QR Code is the same.  But it links to a redirector that can be changed. 

qrcode -> qr.redirect.com/[yourid] -> [your site]

ie:
qrcode -> qr.redirect.com/123 -> neowin.net
qrcode -> qr.redirect.com/123 -> neowin.com

 

So the QR code ALWAYS goes to qr.redirect.com/123 but you change where qr.redirect.com/123 goes to.

[+Nik Louch Subscriber²]

  On 04/05/2019 at 17:49, Deep_Level_Shark said:

Okay.  image never changes then....fine. 

 

so when you use a scanner to read this QR code , your scanner device will show you same content every time ?  yes/no ?

 

( scanner device cant redirect)

 

I'm still confused.

Expand  

The QR code image never changes.

The QR code content never changes - it always links the client to a url, the same url every single time.

 

BUT

 

That URL is just a forwarder.  Like a url shortener it then sends the user on the the page that it is "CURRENTLY" meant to.

 

 

[exotoxic]

My bus "e-ticket" uses an animated QR code which changes every 2 - 3 seconds the scanner is faster than the changes so i am not sure what purpose it actually has.

[+Nik Louch Subscriber²]

  On 04/05/2019 at 18:28, exotoxic said:

My bus "e-ticket" uses an animated QR code which changes every 2 - 3 seconds the scanner is faster than the changes so i am not sure what purpose it actually has.

Expand  

An extra level of authentication.  You can't take a sreenshot and send to your mate.

[Deep_Level_Shark]

  On 04/05/2019 at 18:00, adrynalyne said:

It shows a url that redirects to whatever. QR codes only show what they are encoded to show. They cannot show anything else without changing the image. You can change where the url goes to though. 

 

Example. I have a redirect called foo.com. I make a QR code. It points to foo.com. Foo.com this week redirects to google.com. Next week, I’ll change it to redirect to bing.com. Foo.com didn’t change, so the image didn’t change. 

Expand  

How it redirects ? 

 

Is it like this ?

a  person scans first with his scanner device and he found out that  it is  foo.com after scan ....he then opens chrome browser and typed foo.com and hit enter.

 

 

 

[adrynalyne]

  On 05/05/2019 at 02:39, Deep_Level_Shark said:

How it redirects ? 

 

Is it like this ?

a  person scans first with his scanner device and he found out that  it is  foo.com after scan ....he then opens chrome browser and typed foo.com and hit enter.

 

 

 

Expand  

Pretty much. Then foo.com goes wherever it is set to. 

[Deep_Level_Shark]

  On 05/05/2019 at 03:52, adrynalyne said:

Pretty much. Then foo.com goes wherever it is set to. 

Expand  

 

what you are trying to say here , in simple words , is

 

if your content is a Link  then its a Dynamic QR Code.

if your content is Not a  Link ( but text only)  then its a Static QR Code.

 

Is it really the difference between Dynamic QR Code and Static QR Code ?