The design of QR codes also make them well suited to 3D printing, and thanks to a new web-based tool, you can generate your own custom STL in seconds. Created by [Felix Stein], the website ...

QR Codes are a two-dimensional type of matrix ... It’s a great example of cryptographic analysis – and so is this story on hacking your own password.

What is a QR code? How Do QR Codes Work? A QR code is a machine-readable matrix barcode and it stands for “quick response” code. You can use the camera app on any phone to scan a QR code.

By the end of this article, you should know what a QR code looks like and all the things it can do. From there, you can go on ahead and create your own for others to use should you wish.