SMS OTP is a second authentication factor that confirms a person has physical access to a specific mobile phone. The conventional way to log in to a service is with a username and password, both things the user knows, which counts as a single factor. Requiring a code sent to a phone they carry with them adds a second factor, something they possess, making it significantly harder to compromise remotely.

The user receives a six-digit one-time code by SMS, enters it, and the code expires immediately after. Scrive can send codes to mobile phones in over 80 countries.

In eID Hub, SMS OTP is the provider smsOtp and supports authentication only.