Generate a Key Pair Using GPG Suite on macOS

If you elected to receive your statements in an encrypted form, you would first need to generate an RSA Key pair. To generate an RSA Key:

Download the GPG Suite for macOS
Double click on the downloaded installation file:
Click on Install
Click Continue
Click on Install
Click Install

By default the installation includes an add-on for Apple Mail called GPG Mail. If you don't use Apple Mail and do not need this add-on, you can de-select it during this step.
Click on Close
Launch GPGTools. The Create new key pair dialog box should automatically open. Input your Full Name, your Email and choose a Password. PLEASE NOTE: Keeping a secure copy of this password is essential. Any loss of this password will require the whole process to be repeated.
Expand Advanced options and make sure that:
- The "Key type" drop-down is set to "RSA and RSA (default)"
- "Length" is set to "2048"
- The checkbox "Key will expire on" must remain NOT active
  
  Please be absolutely certain to set "Key type" to "RSA and RSA (default)" otherwise the key will be unusable.
Click on the button Create Key
Once the key pair is created it will be listed in your Key ring. Right click on it and select Export...
Choose a location to save the key pair in the Where field and make sure the checkbox Include secret key in exported file is deactivated. Click on Save.
You will receive a prompt indicating that the key pair was created successfully. Click on No, Thanks! to prevent uploading the public key to the PGP servers.
Open Finder and go to the location you selected for saving the public key (at point 12).
Send the public key file to us via Message Center ticket or email as per instructions listed here.