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Editorial Reviews. About the Author. Mr. Thomas has held senior sales and marketing positions Square Things I Now See Everywhere?: Smartphone Barcoding Technology - Kindle edition by R. Henry Thomas. What Are Those Funny Little Square Things I Now See Everywhere?: Smartphone Barcoding Technology.
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In this case, a QR code is being used to allow a computer and smartphone to communicate with each other.

QR Codes Explained: Why You See Those Square Barcodes Everywhere

QR codes can also be used to log into websites. QR codes do have their uses. To use a QR code, someone has to have a dedicated barcode reader app on their phone, launch the app, and scan the barcode to visit the website. In the same time, they could just have typed a short URL for the website or performed a Google search for it.

Look for the lock

To make matters worse, scanning a QR code can be complicated by the need to capture it at the appropriate angle, with enough light for the camera to see it, and without camera movement. Just open your app, start a scan, point it at a QR code, and the app should recognize and take action based on the QR code — generally opening its website in your browser. QR codes actually have some security problems — it would be easy for an attacker to print a QR code with a malicious URL on a sticker and affix it over a QR code in a high-traffic area.

A QR code redirects you to an URL in your mobile browser, so it would be possible to take the user to a phishing site or a page that exploited a vulnerability in their mobile operating system.


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PowerApps Barcode Scanner App

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What is a QR Code?

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