An electronic device is disclosed. The electronic device which is included in a home network, the device includes a sensor, a communicator comprising communication circuitry configured to communicate with an external device which is included in the home network, and a processor configured to control the communication circuitry, to encrypt first data which is initially acquired from the sensor with a first encryption algorithm and transmit the encrypted standard data to the external device, determine third data based on the first data and a second data in response to the second data being acquired from the sensor after the first data is acquired, to encrypt the third data with a second encryption algorithm and to transmit the encrypted third data to the external device.