TechCrunch reports Google has acquired the startup company SlickLogin, which appears to live up to its name with a whole bunch of clever ways of allowing you to login to a website without using a password. The key ingredient is sound.

To verify a user’s identity and log them in, a website would play a uniquely generated, nearly-silent sound through your computer’s speakers. An app running on your phone would pick up the sound, analyze it, and send the signal back to the site’s server confirming that you are who you say you are — or, at least, someone who has that person’s phone …  expand full story