Smart ring:
https://mymotiv.com/blog/motiv-ring-biometric-verification/
https://mymotiv.com/online-security/
https://www.wearable-technologies.com/2019/02/are-smart-rings-the-smartwatches-of-the-future/
Smartwatch:
Brain-computer-interface:
https://www.express.co.uk/news/science/821955/AI-mind-reading-artificial-intelligence
https://www.express.co.uk/news/science/794783/Facebook-BRAIN-mindreader-mark-zuckerberg
Relevant resources and labs: