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This demonstration shows a new concept for securely downloading keys in RFID devices, with an Android NFC enabled mobile. Today most of electronic ticketing or physical access control systems work with Mifare components. A dual interface RFID is compatible with this deployed ecosystem but also includes trusted computing facilities, and is compliant with the ISO 14443 standard. We use such a device, running a trusted SSL/TLS stack, in order to perform HTTPS operations supervised by an Android mobile phone. Keys are securely downloaded from WEB servers and afterward used by legacy Mifare systems, such as electronic locks.