Google has acquired another tech startup, this time Israel-based SlickLogin who specializes in passwords that use sound.

SlickLogin’s product had a website create an almost inaudible tone when you tried to log in, you’d then hold up your phone to your computer’s speaker and it would verify that it had heard your tone and then send your credentials in. In theory, it would make remembering a password unnecessary, but it could also work well for two-factor authentications — instead of entering in a unique code from your phone, it could just communicate your identity directly.

Google already has a widely-used two-factor authentication app that’s used both for its own products and others, and it’s not crazy to think that something like SlickLogin could become a part of that.

SlickLogin believes “logging in should be easy instead of frustrating and authentication should be effective without getting in the way”.

Its founders are Or Zelig, a former data security expert with the Israeli Defense Forces, and two security researchers, Eran Galili and Ori Kabeli. A detail of how much Google has paid for this service has not yet been disclosed.