Patent ID: 8166529

Claim:
A method comprising: maintaining, at a mobile electronic device, a centralized register of at least one usage context; prompting a user of the mobile electronic device to select, with a user input of the mobile electronic device, a particular one of said at least one usage context; identifying the selected usage context using identifiers stored in the centralized register, each of the identifiers associated with a usage context of the at least one usage context, each of the identifiers linked to a user key and user certificate for the user and stored in a security element of the mobile electronic device, for the case the selected usage context is not identified, then determining whether the selected usage context is used for the first time, in response to the determining the selected usage context is used for the first time, prompting the user to perform a certificate request via a wireless communication with one of a service and certificate authority, where the user authenticates with the one of a service and certificate authority using the user input, and obtains, via the wireless communication, the user key and user certificate to link with the selected usage context, and in response to the determining the selected usage context is not used for the first time, prompting the user to select with the user input, from the security element of the mobile electronic device, a particular user key and user certificate from a selection indicated on the display of the mobile electronic device and linking the selected particular user key and user certificate with the selected usage context; and automatically selecting the user key and certificate linked to said selected usage context, wherein the selected usage context is for use in a transaction made by the user.