The SMSAuthenticator was originally developed to support secure communication between patients and the health care sector without requiring patients to obtain additional hardware. Since the module is run as a web-service, using SOAP to communicate with other software systems, it can be used in a wide range of applications where cost-effective and secure authentification is required.
SMSAuthenticator is an authentication module for situations where "username and password"-login provide insufficient security. The additional security is achieved by sending keys (single-use passwords) by SMS to the user's mobile phone. SMSAuthenticator solves some of the main problems with ordinary passwords (for instance password guessing and password sniffing) without requiring special hardware on the user's side.
(Source: Official Website)
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