1. F5 Labs: 2020 Phishing and Fraud Report (Detailed Investigation Report) (2020). https://www.f5.com/labs/articles/threat-intelligence/2020-phishing-and-fraud-report
2. APWG: Phishing Activity Trends Report (Detailed Investigation Report) (2020 Q4). https://apwg.org/trendsreports/
3. P. Kieseberg, et al., QR code security, in Proceedings of the 8th International Conference on Advances in Mobile Computing and Multimedia (2010)
4. Authentication. https://en.wikipedia.org/wiki/Authentication
5. Authentication Methods That Can Prevent the Next Breach. https://www.idrnd.ai/5-authentication-methods-that-can-prevent-the-next-breach