This TechCrunch article from last year goes into more details on the implementation, including a Q&A with the founders: http://techcrunch.com/2013/09/09/slickl

This TechCrunch article from last year goes into more details on the implementation, including a Q&A with the founders: http://techcrunch.com/2013/09/09/slicklogin-wants-to-kill-the-password-by-singing-a-silent-song-to-your-smartphone/ http://techcrunch.com/2013/09/09/slicklogin-wants-to-kill-th... And here's a ShowHN thread (unfortunately light on interaction with the submitter): https://news.ycombinator.com/item?id=6359450 https://news.ycombinator.com/item?id=6359450