How to Enable Two-Factor Authentication

If you take privacy and security seriously, you may wish to set up two factor authentication on your online accounts.

Google:
The search giant’s two-step verification works in a similar way. It sends a one-time-use, four-digit code to your phone that you must be enter before you can access your account. To activate two-step verification, sign in to your Google account. Under the Sign-in and Security section, choose Signing in to Google. Then select 2-Step Verification, and follow the instructions on-screen.

Facebook:
Protecting your access to the most popular social network in the world is a must. To activate two-step verification, go to Facebook’s security settings, and click on Login Approvals. Facebook will confirm your mobile-phone number by sending a verification code to your phone, which you then have to enter on your computer.

Microsoft:
To tighten security across multiple Windows and Xbox services at once, you can switch on your Microsoft account’s two-step verification. Go to Microsoft’s Security settings page, scroll down to Two-Step Verification, and choose Set Up Two-Step Verification. Then follow the on-screen instructions.

Yahoo:
Sign into your Yahoo account, then click Security, Two-Step Verification, and follow the instructions. If you haven’t added a phone number to your Yahoo account, it’ll ask you to do so. Similarly to Microsoft, some Yahoo services such as Messenger on Windows, and most Mail apps, will require a one-time “app password” after two-step verification has been activated.

Tumblr:
At the top of the Tumblr Dashboard, click Account and then Settings. Go to the Security section, and click on “Two-factor authentication.” You’ll have to type in your phone number.

Twitter:
Sign in to your Twitter account, and go to Settings. Choose “Require a verification code when I sign in,” then “add a phone” if you haven’t. After you’ve turned on Login Verification for Twitter, each time you sign out of and then sign back into the service, it will text you a six-digit code.

LinkedIn:
After you log in, go to your account’s Security settings, and click Turn On under Two-Step Verification. It’s the only option there. You’ll be asked to enter a phone number.

Source: Parallax