Patent ID: 7697920
Filing Date: 2010-04-13
Classification: G06F,H04L,H04W

Abstract:
1. A method for initializing a mobile communication device for use as an authentication device comprising: receiving user information at the mobile communication device, the user information also being provided, by the user, to a trusted server; opening a dialog between the mobile communication device and the trusted server, the dialog being carried out over a wireless communication link; generating shared information in connection with the dialog; wherein the shared information includes a shared secret generated via a cryptographic key exchange between the mobile communication device and the trusted server; storing the shared information in a user programmable memory of the mobile communication device; wherein the shared information enables, at least in part, the mobile communication device to operate as an authentication device; receiving, from the trusted server, a digital signature of a quantity incorporating at least a portion of the user information and the shared secret; digitally signing a quantity incorporating at least a portion of the user information and the shared secret stored in the user programmable memory so as to generate a validation signature; comparing the digital signature with the validation signature; and aborting, in the event the digital signature and the validation signature are different, the initialization of the mobile communication device for use as an authentication device.