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How to setup Cryptnox FIDO2 card for
Bitfinex account

Step by step tutorial

Passkey Support Across Operating Systems and Web Browsers:


The availability of passkey support may vary based on the operating system and web browser in use.


  • MacOS: Passkey support is available in browsers such as Safari and Firefox.
  • Windows: Most modern web browsers provide passkey support.
  • Mobile devices: It is recommended to use the mobile web version of the service, as many applications redirect users to a mobile browser to complete the
    passkey setup process.

Before you start

Before you start your Bitfinex Account setup, make sure you have a contactless reader that is compatible with ISO 14443 for contactless or ISO 7816 for contact reader.

Step 1

Log in to your Bitfinex account and go to “Account”.

Step 2

Go to “Security“ and select “Set up” for FIDO (U2F).

Step 3

Give a name for your security key. This can be anything you like and then select “Begin device registration”.

Step 4

The system will prompt the available options to setup a passkey. Ensure to select the “OK” on pop ups.

Step 5

The system will prompt the available options to setup a passkey. Ensure to select the “Security key” and select “Next”.

Step 6

The system will prompt the message to setup the security key. While the prompt is opening, place the card on the contactless reader.

Step 7

Once the card is registered properly, the system will ask you to put the PIN. Once you put in the PIN, select “OK” and in the next pop up, select “OK” again.

Important: Ensure you remember your PIN. It is advisable to save it securely or write it down in a safe place. You will need this PIN the next time you log in to a site where you have set up passkey authentication.

Step 8

You may need to enter the 6 digits code that you will get from the Google Authenticator app. Enter the code here and select “Authenticate”.

Step 9

You may need to enter the 6 digits code that you will get from the Google Authenticator app. Enter the code here and select “Authenticate”.