GitHub supports Universal 2nd Factor authentication · GitHub
github.com/blog/2071-github-supports-universal-2nd-factor-authentication
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
To help users better secure their accounts, we are expanding GitHub's authentication system to support FIDO Universal 2nd Factor (U2F)—a rapidly growing open authentication standard. GitHub…