Two-Factor Authentication is a very secure way to protect your online accounts. It works by requiring you to identify yourself using two different things when you log-in to a site. The second factor is tied to something 'you have' (like a cellphone). So you can think of two-factor as something you know (your password) + something you have (your cellphone).
Regularly you use a username and a password to log-in. With Two-Factor Authentication you would use a username, a password and a token. The token is a unique number that your cellphone generates and is constanty changing. Because only your cellphone can generate that number and only you own the cellphone, even if someone was able to guess or steal your password if you enable two-factor authentication they wouldn't be able to hack your account without stealing your cellphone too.
Authy makes it really easy to use Two-Factor Authentication on your online accounts using your smartphone. We provide you an App that makes it easy for you to keep all your tokens and "just" works. Our goal is to make it easy and straightforward for anyone to use Two-Factor authentication on all of your accounts.
Adding Authy Tokens is very easy. Just enter your cellphone number and follow the steps below:
Enter your cellphone number here.
If you don't have an account, we'll ask for your e-mail to create one
Lastly, for security we'll use your number to send you a registration pin. You can get one via SMS or Phone Call.
Authy tokens are automatically synchronized. Just open the app and they will be downloaded automatically.
Add to Google Authenticator Accounts is very easy:
You can also add tokens from Websites that support Google Authenticator such as GMail, Dropbox, Lastpass and Amazon Web Services. Each of this websites has a different way to enable Two-Factor Authentication, but you can usually find the enable page on your user settings page. If you are unsure, contact there support staff. Once you enable two-factor on the website, they will present you with a QRCode image. Use the Authy App to scan that QRCode and you are set.