Definition
QR-codes may be used to share sensitive information between users, for example the address of the wallet to whom to send bitcoin or other cryptocurrencies
Benefits
QR-code have become widespread because:
- can contain more information than barcode: barcode (20 digits) and QR-code (7089 characters)
- simplifies payments and gives a guarantee of its correct execution: saving time and eliminating human errors in the process
Shortcomings
- hard to tell what a QR-code contains in advance