I was interested in this about a year ago, but never pursued it. The previous link and these two I had bookmarked: This one includes a prototype: http://blog.s

I was interested in this about a year ago, but never pursued it. The previous link and these two I had bookmarked: This one includes a prototype: http://blog.self.li/post/14864315302/qr-login-howto http://blog.self.li/post/14864315302/qr-login-howto This one has a high-level overview from a tech perspective: https://www.grc.com/sqrl/sqrl.htm https://www.grc.com/sqrl/sqrl.htm