Drupal.org users* can now use Two factor authentication to increase the security of their accounts. It can be enabled via Security tab of your user profile page. Read the detailed instructions at Enabling TFA on Drupal.org.
This was made available to Drupal.org admins in May. It is now required for users who have advanced access on Drupal.org. However, every user can benefit from the security that two factor authentication offers.
If you want to make two factor authentication available on your own Drupal site, you can install the TFA module.
* Two factor authentication is available for all users with the 'confirmed user' role. If you don't see 'Security' tab on your profile page, you might be missing the role. Just keep posting content on Drupal.org and it will be granted soon. You can also apply to get the role.