This includes smartphones, mobile devices, security tokens, key fobs and other devices that can either generate or receive one-time passwords (OTPs) or codes. This includes passwords, a PIN (personal identification number), or answers to security questions. SMS authentication is not typically used as a primary or sole authentication method, but it's commonly used as the second authentication factor in two-factor authentication (2FA) and multi-factor authentication (MFA).Īuthentication types are broken out into three main categories, with SMS authentication falling under the Possession factor: Passwords are the least secure authentication method and can be guessed, stolen or bought on the dark web, so they need to be reinforced. Presenting users with multiple options to verify their identity helps reduce fraud and defend against bad actors. What is SMS Authentication in Two-Factor Authentication (2FA) and Multi-Factor Authentication (MFA)? Let's look at how SMS authentication works and whether it is secure. SMS can also be used to authenticate a user's identity. Texts sent to your phone can be forwarded or synced with other devices to make sure you never miss a message. Short message service (SMS), also known as text messaging, is something you may use every day with your friends and colleagues.
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