> For the complete documentation index, see [llms.txt](https://idax-exchange.gitbook.io/allhelp-center/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://idax-exchange.gitbook.io/allhelp-center/help-center/security-verification-2fa.md).

# Security verification 2FA

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

Two-factor authentication (2FA), sometimes referred to as two-step verification or dual-factor authentication, is a security process in which users provide two different authentication factors to verify themselves. It is a combination of two of the following: 

* Something you know (Your Password) 
* Something you have (Such as a text with a code sent to your smartphone or other devices)
* Something you are (Biometrics using your fingerprint, face, or retina)

2FA is implemented to better protect both a user's credentials and the resources the user can access. Two-factor authentication provides a higher level of security than authentication methods that depend on single-factor authentication (SFA), in which the user provides only one factor typically, a password or passcode.

## Why do I need to enable 2FA?

In addition to security concerns during login, all users who trade on P2P need to receive payments, release coins, and perform other operations during the buying and selling process. These operations require users to enter a two-factor authentication code to verify that the users themselves are carrying out the transaction.

### FAQ

{% content-ref url="/pages/oPTJUZeyapKj8ZXr1DOB" %}
[How to change your e-mail?](/allhelp-center/help-center/security-verification-2fa/how-to-change-your-e-mail.md)
{% endcontent-ref %}

{% content-ref url="/pages/RUrTkg8FEgsA460DI6sl" %}
[How to change my mobile number?](/allhelp-center/help-center/security-verification-2fa/how-to-change-my-mobile-number.md)
{% endcontent-ref %}

{% content-ref url="/pages/KuSOgHPszOZy0CKmbdRj" %}
[Why can't I verify my phone number?](/allhelp-center/help-center/security-verification-2fa/why-cant-i-verify-my-phone-number.md)
{% endcontent-ref %}

{% content-ref url="/pages/NYPEgGbOUC3UQgRoGNg9" %}
[How to enable Google Authentication (2FA) on idax?](/allhelp-center/help-center/security-verification-2fa/how-to-enable-google-authentication-2fa-on-idax.md)
{% endcontent-ref %}

{% content-ref url="/pages/hi2L3xRpwcZrnY6TXc0U" %}
[How to solve a 2FA code error?](/allhelp-center/help-center/security-verification-2fa/how-to-solve-a-2fa-code-error.md)
{% endcontent-ref %}

{% content-ref url="/pages/uHr8TMg43axvvTATrfJq" %}
[How to find my user ID on idax?](/allhelp-center/help-center/security-verification-2fa/how-to-find-my-user-id-on-idax.md)
{% endcontent-ref %}