Most security experts agree that two-factor authentication (2FA) is a critical part of securing your online accounts. Google agrees, but it’s taking an extra step: It’s going to sign up Google account holders up for two-factor accounts automatically.

Google sees two-factor authentication as a replacement for passwords, which Mark Risher, Google’s director of product management for identity and user security, in a statement called “the single biggest threat to your online security.” Because they’re easy to steal and hard to remember, users will end up reusing passwords. If stolen, they can be used to unlock multiple user accounts, adding to the risk.

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