this post was submitted on 14 Mar 2025
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I get what you're saying but it's at least a little bit funny that they are regularly used for security in the form of scan to login (e.g. Steam), verify your session (e.g. Matrix), etc. Of course these are in a closed ecosystem so the QR code itself is not the security. But I just found it funny you said that when 90% of my QR code usage is for security.
I mean, generating a one time QR code for login is one thing. It's the equivalent of a one time password. But a permanent QR code is not that. They still aren't inherently secure, but they can be used in situations where showing a code in plain text would be just as secure.
Yeah, my language was overly broad. You can use QR codes as part of a system where the security is going on elsewhere, but the integrity of the QR code itself isn't something that can be relied on for security.
I mean it's more like it's used to transfer small amounts of data over a visual medium in those cases. Basically just a shortcut over having to type a whole string of characters manually.