While these terms are technically a little different than 2FA, for most consumer applications they are more or less the same thing. Some companies call this sort of security MFA (multi-factor authentication) or two-step verification. Installing an alarm system is basically adding 2FA to your house! If you had to open your door with both a physical key as well as entering a four-digit pin into an electronic lock, that would be two-factor authentication (the key you possess and the pin you know). If you can open it with just a key, that’s one-factor authentication you only must possess your house key. A third factor may be inheritance-something specific to your being, like your fingerprint or a retinal scan.Ĭonsider the front door to your house. Another factor may be possession of a particular object-a phone that receives texts sent to a certain number, a USB key fob, or access to an email address. One factor is a piece of knowledge-your password or PIN, for instance. Two-factor authentication (usually abbreviated 2FA) is a way to prove that you actually are the owner of a particular account by providing two “factors” of evidence.
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