# Two-factor authentication (2FA)

### Add two-factor authentication (2FA) to your account

Log in to your Synergy of Serra account via the website.

Download an authenticator app, such as [Google Authenticator](https://www.wired.com/story/how-to-use-google-authenticator-app/). 

Go to your Account page, click *Activate,* and follow the instructions.

### What is two-factor authentication (2FA)?

Two-factor authentication (2FA) adds a layer of security that is used to protect accounts and personal information. This additional layer is typically a one-time code that is generated by an app or sent via text message to a user's phone.

The most common form of 2FA is a combination of a password and a one-time code that is generated by an authentication app or sent via text message to a user's phone.

2FA can be used to protect a wide range of accounts, including email accounts, social media accounts, and online banking accounts. It is also commonly used in cryptocurrency exchanges and trading platforms to secure users' accounts.

It's important to note that 2FA is not foolproof, and the security of the 2FA method can vary. Some methods, like SMS-based 2FA, are considered less secure than other methods, such as using an authenticator app.

### How does two-factor authentication (2FA) work?

It typically works like this:

1. User attempts to log in to an account by entering their username and password.
2. The system prompts the user for a one-time code, which is generated by an app or sent via text message to the user's phone.
3. User enters the one-time code and is granted access to the account if the code is correct.

The one-time code is typically valid for a short period of time (e.g. 30 seconds) and can only be used once. This makes it much more difficult for an attacker to gain unauthorized access to an account, even if they have obtained a user's password.


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