I’ve seen something similar for a mobile app: https://www.onenigma.com/case-study/typingID https://www.onenigma.com/case-study/typingID A friend built it a fe

I’ve seen something similar for a mobile app: https://www.onenigma.com/case-study/typingID https://www.onenigma.com/case-study/typingID A friend built it a few years ago. It’s integrated into at least one app, and has some serious potential. I suspect a regular keyboard would be the same.