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I painted my wifi password as a QR code on 40x40cm canvas.. Painted as in with a brush and paint, it was a bit of work, but now it's both pragmatic and pretty :)
If you change the password, will you repaint the picture?
Who cares if my neighbors or people walking by can use it?
I painted my wifi password as a QR code on 40x40cm canvas.. Painted as in with a brush and paint, it was a bit of work, but now it's both pragmatic and pretty :)
So that it is visible from the street...
If people want anonymous WiFi for nefarious purposes they can go to a cafe.
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They can’t be used to encode very much data though. They wouldn’t be suitable for storing documents, but could be used to store the location of a document. I was trying to be clever once and thought I could encode X.509 certificates in QR codes. Even that much data was pushing the hard limits of what they can store, and became very hard to scan (I quickly realised this wasn’t actually very clever).
7kb for a supermarket bill is plenty, and you can have several of them. Forms and legal documents should all have an immutable official url and uuid anyway to point to their legal and administrative context.
My back-of-the-envelope calculations say you'd need 61 bits per line on a receipt just to encode UPC, quantity and price. So the largest QR code would only allow 19-50 lines. And that's without including data like the store name, special offers, means of payment and so on. Believe me, plenty of people buy more than 50 items in their supermarket christmas shop :)
Standardised digital receipts would be neat but, QR codes encoding the data ain't the way to go about it.
[1] https://www.qrcode.com/en/about/version.html [2] https://commons.wikimedia.org/wiki/File:Qr-code-ver-40.svg
Most ISP put this kind of QR code on the provided "modem" in France with the default Wifi password of the device. I love QR code. I think it should be everywhere. All legal documents and forms should have one. All supermarket bills should have one. It's a fantastic way to transition from paper to bits. Unfortunately most users have no idea what it is. They don't know what a URL is, so a QR code is out of the question…
Are you not concerned that QR code’s are just completely opaque URLs asking to be clicked? Do you confidently click on URLs in spam emails? Of course not since we all know URLs can point to malicious payloads. So why should we love QR code’s that could just as easily do the same. If I’m a spammer trying to get people to click on my bogus links in my email messages, why wouldn’t I also print those same URLs as QR code…
Parent was referencing trusted contexts: the default password printed on your wifi router, the bill a cashier just handed you for what you just bought, the legal papers you just signed, etc. The QR code just links the trusted document with trustworthy digital versions & extended content.
I'm not worried a spammer is going to get a bogus QR printed on the grocery store receipt I just received. I'm not going to scan QR codes printed & posted on subway walls for no apparent reason.
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firefox preview has an embedded qrcode scanner
For url only. Qrcode are for much more than url.
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No more than regular url written in a paper. People write them blindly anyway, they don't know what it means nor how to read it. But QR code are not just for URL, they can contain up to 7k, which is a lot for text and numbers. And you can have several of them, use compression, etc.
Because urls have letters & words in english that I can read and determine if the website is authentic or not as opposed to QR code that no human can read? Have you never come across phishing scams that looked eerily authentic only to be clued in by the fake url? I can read the URL before going to the website, and unless QR codes have a step where you have to manually confirm going to the url provided by the code (mo…
You must have some super-human ability to read a computer's mind if you can grok the kind of urls that usually come in emails like https://tinyurl.com/uvc58uq
On the other hand it could have been a great way to develop much better relationships with your customers. As a trivial example, I own a snowblower. It would be nice if there had been a QR code on the machine that identified that specific machine. I could have scanned it and immediately registered it with the manufacturer. Scanning the code could take you to a manufacturer page for your specific machine, where you could record routine maintenance like oil changes, get a copy of the manual, and order replacement parts. They could send you periodic reminders like, "it looks like it's been a while since an oil change", or "it's getting cold outside. Now's a good time to make sure everything is in shape".
There is a ton of stuff around the house that I need to record information about but have to have my own system. If the manufacturer provided a way to do that they could offer their expertise with the product and a convenient way for you to record that information. I'd love to have a QR code on the side of my HVAC system, water heater, filtration system, etc.
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Or is it extra safety to use the CLI? Arguably it is easier to verify that a webapp is not sending the data to a 3rd party, than it is to verify that the CLI tool doesn't (easy network inspection from the developer tools).
Its also very easy to put a webapp into offline mode
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They already have all passwords... They are conveniently backed up on android devices. They have the cleartext. (as do apple btw.)
Apple's WiFi password sharing system uses iCloud Keychain, which is end-to-end encrypted [1] [1] https://support.apple.com/en-us/HT202303
