6.3.1.18. SMS Token¶

The token type sms sends the OTP value via an SMS service. You can configure the SMS service in SMS Token Configuration.

../../_images/enroll_sms.png — *Enroll an SMS token*¶

When enrolling an SMS token, you only need to specify the mobile phone number.

SMS token is a challenge response token. I.e. when sending the OTP PIN in the first authentication request, the sending of the SMS will be triggered and in a second authentication request the OTP value from the SMS needs to be presented. It implements the challenge authentication mode.

For a more detailed insight see the code documentation SMS Token.