HD Barcodes can store text and links like QR Codes, but they add something important: you control who is allowed to read the code.
For this demo, you will authorize one phone with your own secret phrase. After that, you can create HD Barcodes that only that authorized phone can read.
Open this page on a PC or iPad if possible. The barcode will be shown on this screen, and your phone will scan it.
1111-2222-3333.After authorization, pushing [?] in the reader should show tryhdbarcode.com.
You choose the secret phrase. That is the point of the demo: the security is under your control, not ours.
After your phone has learned the phrase, create a protected HD Barcode below. It should read on the authorized phone and fail on other phones.