<https://doubleoctopus.com/blog/enterprise-security/push-notification-authentication/#primaryimage>
<http://schema.org/url>
<https://doubleoctopus.com/wp-content/uploads/2021/08/How-Push-notification-authentication-can-Revolutionize-your-Identity-Security-Secret-Double-Octopus.png>
<https://doubleoctopus.com/blog/enterprise-security/push-notification-authentication/>