What is 2‑Factor Authentication (2FA)?

Two-factor authentication (2FA) verifies a user's identity by requiring two specific forms of evidence. For Example, it may ask for the password from an online account (the first factor) and a one-time code from an authenticator app (the second factor).

Many individuals are aware of SMS text-based 2FA authentication security methods. In this version, a numeric code is sent to the user's mobile phone upon logging in. The user needs to input their password along with the code to continue. Submitting just one or the other does not provide adequate authentication.

2FA is the most widely utilized type of multifactor authentication (MFA), which denotes any authentication approach requiring users to provide multiple factors to verify their identity.

Though 2FA is typically linked to digital systems, it can also protect tangible assets and places. For instance, a secured building could necessitate individuals to show an ID badge and undergo a fingerprint scan to gain entry.

In what ways does 2 Factor Authentication safeguard your users?

Factors such as using the same password multiple times, weak encryption methods, social engineering tactics, and compromised databases can render even a strong password insecure. Mandating users to incorporate a second factor into their authentication process ensures that an account with a breached password remains secure.

Even specific attacks become harder since the attacker would need to gain access to various types of authentication. A study by Google demonstrated that SMS-based authentication "can prevent nearly all automated bots, 99% of large-scale phishing attempts, and 66% of focused attacks".