These codes are not random, as they’re generated from a seed known to the service, as well as following predetermined and unchanging rules. Google Authenticator is an app that provides 2FA codes on your iPhone.īoth the app and keyfob are set up to produce a new code repeatedly after a certain amount of time has passed, such as 30 seconds. This could take the form of a physical object, such as a YubiKey, but more commonly this refers to a mobile authenticator app or an authenticator keyfob. While the password for the account classifies as the “know” portion, the “have” consists of some form of verifiable token. The principle of 2FA is that it’s based on confirming what you “know” and what you “have.” Think of it as using a security door where you have to punch a code into a keypad (“know”) and a physical key into a lock (“have”) to gain entry. If an online attacker knows or can work out your password, 2FA can stop any further access to it. Two-factor authentication is a great way to secure online accounts, as it goes above and beyond the standard username and password. This is what you should know about 2FA, and how to get up and running with it on one of the most popular authentication apps, Google Authenticator. Under a February policy change, Twitter is forcing free users unwilling to pay the Twitter Blue subscription away from the SMS-based 2FA system, in favor of using authenticator apps.ĭespite the hue and cry about it, authenticator apps are better security-wise than using SMS messages. Two-factor authentication (2FA) has entered the news due to a change at the embattled Twitter. Google Authenticator is available for iOS and iPadOS, as well as Android.ĪppleInsider may earn an affiliate commission on purchases made through links on our site.īeyond just making Twitter safer, here’s how to shift away from SMS-based two-factor authentications and secure your online life properly, by using Google Authenticator on your iPhone.
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