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Signicat's SMS OTP is a simple identification method based upon one-time passwords on the SMS channel. A typical scenario may be this:

  • A user accesses a service on a merchant that requires some sort of identification.
  • A merchant sends an SMS with an OTP code to the user.
  • The user types in the recently received code in the merchant's application.
  • The merchant receives the user's telephone number in the response from Signicat.

Although this method alone does not provide adequate security, there is nothing technically that it prevents it from use SMS OTP as a standalone authentication method. However, the most normal and recommended use, is to boost up an existing login process. SMS OTP integrated with any username/password login solution will form a 2-factor authentication method.

 Product information

Product information

Signicat SMS OTP can be easily integrated into your application with absolutely minimal effort. The technical integration with the SMS OTP service is identical with all other ID-solutions that Signicat support.

There are a number of configuration possibilities of the SMS OTP method, including:

  • Possibility for the user to change the telephone number before entering the OTP code.
  • The length of the OTP-codes, downward limited to 4 and maximum no limit.
  • Which country codes the SMS OTP method is valid for.
 Flow diagram

Flow diagram


 Getting started

Getting started

Getting started with SMS OTP is very easy: you only need an agreement with Signicat.

You may contact for mercantile questions, while all technical questions could be addressed to

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