Google has acquired SlickLogin - an Israeli start-up behind the technology that allows websites to verify a user's identity by using sound waves.

SlickLogin showcased its technology at the TechCrunch Disrupt event last year

It works by playing a uniquely generated, nearly-silent sound through computer speakers, which is picked up by an app on the user's smartphone.

The app analyzes the sound and sends a signal back to confirm the identity.

The technology can be used either as a replacement for a password or as an additional security layer.

SlickLogin confirmed the acquisition on its website but did not provide any financial details of the deal.

"Today we`re announcing that the SlickLogin team is joining Google, a company that shares our core beliefs that logging in should be easy instead of frustrating, and authentication should be effective without getting in the way," the firm said in a statement.

"Google was the first company to offer two-step verification to everyone, for free - and they're working on some great ideas that will make the internet safer for everyone."

Source: BBC