METHOD, SYSTEM AND MOBILE TERMINAL FOR UPDATING AND DISTRIBUTING THE SUBORDINATE SECURITY DOMAIN KEY OF A SMART CARD

摘要

A method, a system and a mobile terminal for updating and distributing the subordinate security domain key of a smart card, wherein the system includes a smart card with the electronic payment application function, a mobile terminal, an Over The Air (OTA) server and an off-card entity management platform. The smart card is installed in the mobile terminal, which is set to communicate with the off-card entity management platform via the mobile terminal and the OTA server. The off-card entity management platform is set to distribute the updated subordinate security domain key of the smart card to the smart card via the OTA server and the mobile terminal. The communication is established between the smart card and the off-card entity management platform via the OTA server and the mobile terminal, and safely updating and distributing the subordinate security domain key of the smart card can be realized.