Google acquires password sounds startup SlickLogin

The early stage company, which has not released a commercial product, develops technology that allows Web sites to generate nearly silent tones through a user's computer speakers as a verification replacement for passwords. An app on the user's nearby smartphone picks up the unique audio signal, analyzes it, and send it back to the site's servers for login.
The technology could be used as a replacement for the traditional password or as part of a two-factor authentication, which is intended to reduce users' vulnerability to online identity theft, phishing, and other scams by adding a second level of identity verification to an account log-in.
The three-person company joins a handful of Israel-based companies acquired by Google in recent years, including the spreadsheet company iRows in 2006, entertainment company LabPixies in 2010, and the $1.3 billion purchase of mapping service Waze last year.