QR code

A quick response code is a type of matrix barcode that is faster to read and is able to store more information than a regular UPC barcode. The code is scanned by an imaging device, such as a phone camera, and interpreted with a program to see the contents of the code. When it is used on a paper wallet, it allow the user to quickly upload the information off it and into their software wallet in order for the user to access the blockchain.