(= Quick Response code, "kiirreaktsioonkood")

olemus
maatrikskood komponentide automaatseks tuvastuseks tootmisprotsessis; loodi Jaapanis 1994. a,
praegu laialt kasutusel esemete identifitseerimiseks,
autentimiseks sisselogimisel, andmesalvestuseks maksesüsteemides jm

Merriam-Webster:
a two-dimensional barcode printed as a square pattern of black and white squares that encodes data

ülevaateid
https://www.techslang.com/how-do-qr-codes-work/

https://en.wikipedia.org/wiki/QR_code

https://blog.qrstuff.com/2011/01/18/what-size-should-a-qr-code-be

https://blog.beaconstac.com/2020/02/qr-code-faq/

https://www.qrcode-tiger.com/qr-code-faq

veebisait
http://www.qrcode.com/en/index.html

standardid
https://www.iso.org/obp/ui/#iso:std:iso-iec:18004:ed-3:v1:en

turvalisus
https://www.malwarebytes.com/cybersecurity/basics/what-is-a-qr-code


https://www.kaspersky.com/resource-center/definitions/what-is-a-qr-code-how-to-scan

https://learn.g2.com/qr-code-security

https://blinq.me/blog/6-things-you-need-to-know-about-qr-code-security

https://publications.sba-research.org/publications/llncs.pdf