![]() ![]() ![]() After passing that challenge, you can typically designate a personal device as trusted and skip the codes for future sign-ins. When you use your credentials to sign in on an untrusted device, the service demands that you enter a Time-based One-time Password Algorithm (TOTP) code generated by that app or respond to a notification on the device. The combination of those two factors sets the proof-of-identity bar high enough that your average thief won't be able to get over it. In that case, the two factors are the classic "something you know" (your sign-in credentials) and "something you have" (the mobile device that you've configured with a shared secret). In this post, I describe the most basic form of 2FA, which uses an authenticator app installed on a mobile phone to provide a secondary form of proof of identity when necessary. It takes just a few minutes to set up, and the result is a layer of protection that will prevent intruders from intercepting your email, stealing funds from your bank account, or hijacking your social media. ![]() 10 dangerous app vulnerabilities to watch out for (free PDF)Īdding multi-factor authentication (often called two-factor authentication, or 2FA) to high-value online accounts is one of the most important security precautions you can take.White House: Brace for potential Russian cyberattacksĤ1 impressive questions to ask in a job interview
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