Security keys prevent phishing by giving Dropbox cryptographic proof that you both have your key and are using it on (instead of a phishing page). That’s why Dropbox was one of the first services to adopt Universal 2nd Factor (U2F) for security keys in 2015. For example, a fake Dropbox sign in page could ask for your username, password, and the two-step code. While easy to adopt, using one time codes for two-step verification has weaknesses. In most forms of two-step verification, a user enters a one time code after providing their username and password, and before being signed in. And it’s why we’re excited today to announce support for WebAuthn (“Web Authentication”) in two-step verification, a new standard for strong authentication on the web. That’s why we recommend turning on two-step verification for your account, which adds an extra layer of difficulty for anyone who has guessed, eavesdropped on, or tricked you into giving them your password. Every time you sign in you have to tell the website your password, making it more challenging to keep the secret safe. Unfortunately passwords don’t work that way. The easiest way to keep a secret is to not tell it to anyone.

Dropbox phone support