TechCrunch: Ambient noise could be your next multi-factor authentication token

TechCrunch: Ambient noise could be your next multi-factor authentication token. “We’re all pretty used to two-factor authentication now, and it isn’t much of an inconvenience to have to type in a four-digit code when you log in from a new location. But some Swiss security researchers came up with a smart way to authenticate without even that tiny amount of work: ambient noise.”