Signicat’s SMS OTP is a simple identification method based on one-time passwords sent by SMS. A typical scenario may be this:
Although this method alone does not provide a high level of security, there are no technical obstacles that prevent merchants from using SMS OTP as a standalone authentication method. However, the most common and recommended use is to use it to boost an existing login process. Integrating SMS OTP with any username/password login solution will result in a 2-factor authentication method.