A method and electronic device are disclosed herein. The electronic device includes at least one connector, at least one switch electrically connected to the at least one connector, a sensor, a memory, and a processor electrically connected to the at least one connector, the at least one switch, the sensor, and the memory. The processor implements the method, including detecting insertion of an external device into the at least one connector based on an electrical signal input through the at least one connector, receiving biometric information using the sensor after detecting the insertion of the external device, and controlling a switch electrically connected to the connector to be connected to the connector into which the external device is inserted when the received biometric information matches biometric information stored in the memory.