In most cases, once you’ve used two-factor authentication on a device, you won’t be asked to do so again on that device. This method not only proves that you know something (the user name and password), but also that you have something (the mobile phone), which you have “registered” as a device to receive these codes. Most forms of two-factor authentication ask you to sign in with your user name and password, and then enter a code that is sent to you via SMS. You can also use a two-factor authentication app-which is actually more secure than receiving two-factor codes via SMS-but the phone remains the most common method of using two-factor authentication. When you activate two-factor authentication for a website or a service, you generally first have to provide your mobile phone number. You can find out if services you use offer two-factor authentication on the website. Many of the main services you use offer two-factor authentication. RELATED: What is Two-Factor Authentication? The thing you need to know is a user name and a password or a PIN the thing you need to have is, these days, a mobile phone, but it could also be a USB dongle or other device that can generate one-time codes. This security technique verifies your identity when you log into a website by requiring you to both know something and have something. More and more websites and services are using two-step or two-factor authentication to provide an additional layer of security. And in some cases, they’re passed around for free. These databases are then traded on the hacker underground, allowing anyone willing to pay a few cents per name to access your accounts. We also hear of an increasing number of data breaches, where major websites, stores, or services have entire databases of user names and passwords hacked. And if someone can pretend they are you - steal your identity - they can cause innumerable problems to you and your finances. Hackers would love to get at your data, to empty your bank account, or to access your email account, using it for spam and phishing. You store a lot of your personal data in the cloud, and your credit cards are linked to accounts on retail websites. It’s getting increasingly risky to use online services. How To + Security & Privacy Two-Factor Authentication: How It Works and Why You Should Use It
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