Strong mobile authentication

Our main contribution is a protocol that provides strong mobile authentication with non-repudiation using SMS messages. For ensuring these properties, governmentally controlled PKI, and SIM cards with electronic identity application are used. Moreover, our protocol provides confidentiality and integrity of transferred content. An application that implements this protocol was developed and tested in a partly simulated environment. Furthermore, we developed a protocol for mobile payment for vending machines. In comparison to current systems, this protocol contains several enhancements in security, usability and cost both from the client as well as from the service provider point of view.