US Patent 9626672 Using harvested power for NFC transactions

In some embodiments, a system includes a mobile communication device and a secure element physically coupled to the mobile communication device. The mobile communication device includes a first wireless transceiver, first processor, and first memory. The secure element includes a second wireless transceiver, second processor, and second memory. The mobile communication device is configured to transmit data via the first wireless transceiver to the secure element in packets, using a packet protocol. The secure element is configured to transmit data via the second wireless transceiver to the mobile communication device in messages, using a messaging protocol distinct from the packet protocol.