On this page, we’ve answered frequently asked questions about authentication in general and the Protectimus two-factor authentication solution in particular. You will learn how multi-factor authentication and OTP tokens work, how to integrate the Protectimus 2FA solution into your infrastructure, and how our billing system and partner program work. If you have more questions, please use the form below or contact us in another way convenient for you. All contact details are available on the Contact Us page. As a rule, we respond within one business day.