Security News > 2024 > July > What Is Two-Factor Authentication?

TYPES OF 2FA. Secondary authentication factors vary in how they are used in the verification of user identities.

The simple expedient of texting a time-sensitive code to a mobile device is usually enough to keep most accounts secure.

A time-based one time password is another approach to 2FA: A key is locally generated on the device the user wants to access, such as a QR code for the user to scan that then generates a series of time-sensitive numbers to be entered into a website or application.

The advantage of TOTP is that the user is not tied to a secondary device, such as a mobile phone.

The secondary authentication factor can be entered into any device, whether phone, tablet, laptop or PC. However, TOTP demands that the user possess a device that can read a QR code.

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