![]() ![]() Three-factor authentication is something you know, plus something you have, plus something you are (a biometric input, such as a fingerprint scan to unlock your phone). Systems that use two-factor authentication require a username and a password, plus a one-time password or code (sent to your mobile phone, for example) to access them. Two-factor authentication is something you know (password), plus something you have. Systems that use one-factor authentication only require a username (such as an email address) and a password to access them. One-factor authentication is something that only you know, like your password or PIN. ![]() Send fraudulent email requests for payment. ![]() These could trick your friends and family to give out personal information or install malware onto their devices.
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