We have always been advising you to enable two-factor authentication — or 2FA — to secure your online accounts, a process that requires users to manually enter, typically a six-digit secret code generated by an authenticator app or received via SMS or email.
So even if somehow hackers steal your login credentials, they would not be able to access your account without one-time password sent to you.
But, Are SMS-based one-time passwords Secure?
