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1
vote
1answer
90 views

“Inverted” asymmetric encryption

I am developing a system to prevent frauds in tickets. What do I need? An algorithm to generate a QR Code that will be shown to my clients in a ticket. An algorithm to validate (offline) the ...
0
votes
1answer
66 views

Making it harder to scan on-screen QR-code from a distance

Say I have a QR-code on my laptop screen that I need to scan with my mobile device. Is there anything that can be done to make the on-screen code harder to scan from a distance? I am thinking for ...
21
votes
6answers
8k views

Could SQRL really be as secure as they say?

I just came across https://www.grc.com/sqrl/sqrl.htm With Secure QR Login, your phone snaps the QR code displayed on a website's login page . . . . and YOU are securely logged in. This ...
0
votes
1answer
604 views

QR code as certificate of authenticity

I need details about QR code that provides information about whether its product is original or not. The situation is a stamp that tells that this product has been certified as safe to be use by this ...
-1
votes
5answers
651 views

Looking for something like a QR code that cannot be copied/reproduced

Can QR codes always be copied? I am looking for some sort of QR code or chip that can be readily scanned (preferably via smartphone) and linked to a secure website, but that cannot be copied or ...
13
votes
3answers
323 views

Malicious QR Code and Mitigation

I just started reading a little on QR code, so I'm not entirely familiar with QR Code capabilities, but a thought crossed my mind today. I scanned a QR Code on a postcard I received, and it ...
11
votes
5answers
3k views

QR codes that can't be copied - possible?

I assume this is impossible, but I need to find a barcode (that can contain a url, i.e., a QR style one). It has to be photographed by our smartphone app, but the image will not be changed over a ...