| 摘要 |
The present invention aims to avoid a needless increase in cable wiring when a cipher key is shared between other electronic devices upon encrypted wireless communication. A semiconductor integrated circuit comprises a wireless communication control circuit for the encrypted wireless communication, a processing unit for managing the cipher key, and a power line communication circuit. The semiconductor integrated circuit is operated by a power supply voltage supplied externally to the power line communication circuit via a power line. The power line communication circuit is coupled to other electronic devices via the power line. The wireless communication control circuit communicates with the other electronic devices by the encrypted wireless communication. Before the semiconductor integrated circuit performs encrypted wireless communication with other electronic devices using the wireless communication control circuit, the semiconductor integrated circuit supplies information about the cipher key to other electronic devices via the power line communication circuit.
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