1. Adafruit fingerprint sensor. https://www.adafruit.com/product/4750.
2. Airtag. https://www.apple.com/airtag/.
3. Apple watch. https://www.apple.com/watch/.
4. Current mfa fatigue attack campaign targeting microsoft office 365 users. https://www.gosecure.net/blog/2022/02/14/current-mfa-fatigue-attackcampaign- targeting-microsoft-office-365-users/.
5. Dealing with phantom mfa challenges in microsoft 365. https://duo.com/blog/ mfa-fatigue-what-is-it-how-to-respond.