A first electronic device (400, 950, 960) comprising: an electrode interface attachable to at least a portion of a body of a user; a memory; and a processor operably coupled to a communication interface, the electrode interface and the memory, the processor configured to: obtain user information through a user authentication; generate a user authentication signal based on the obtained user information; transmit to a second electronic device a control signal for obtaining a specified type of biometric information and a first signal including at least a portion of the user authentication signal through at least the portion of the body of the user to which the electrode interface is attached; receive, in response to the transmitting of the control signal and the first signal, a second signal via the electrode interface, wherein the second signal is transmitted from the second electronic device (500, 910, 920, 930, 940, 970, 980), which is attached to another portion of the body of the user and which received the transmitted first signal, identify, in response to the receiving of the second signal, a biometric information corresponding to the specified type based on the second signal, identify, in response to the identifying of the biometric information, at least portion of the user authentication signal from the identified second signal, and store, in response to the identifying the at least portion of the user authentication from the received second signal, the identified biometric information in the memory. an electrode interface attachable to at least a portion of a body of a user; a memory; and a processor operably coupled to a communication interface, the electrode interface and the memory, the processor configured to: obtain user information through a user authentication; generate a user authentication signal based on the obtained user information; transmit to a second electronic device a control signal for obtaining a specified type of biometric information and a first signal including at least a portion of the user authentication signal through at least the portion of the body of the user to which the electrode interface is attached; receive, in response to the transmitting of the control signal and the first signal, a second signal via the electrode interface, wherein the second signal is transmitted from the second electronic device (500, 910, 920, 930, 940, 970, 980), which is attached to another portion of the body of the user and which received the transmitted first signal, identify, in response to the receiving of the second signal, a biometric information corresponding to the specified type based on the second signal, identify, in response to the identifying of the biometric information, at least portion of the user authentication signal from the identified second signal, and store, in response to the identifying the at least portion of the user authentication from the received second signal, the identified biometric information in the memory. obtain user information through a user authentication; generate a user authentication signal based on the obtained user information; transmit to a second electronic device a control signal for obtaining a specified type of biometric information and a first signal including at least a portion of the user authentication signal through at least the portion of the body of the user to which the electrode interface is attached; receive, in response to the transmitting of the control signal and the first signal, a second signal via the electrode interface, wherein the second signal is transmitted from the second electronic device (500, 910, 920, 930, 940, 970, 980), which is attached to another portion of the body of the user and which received the transmitted first signal, identify, in response to the receiving of the second signal, a biometric information corresponding to the specified type based on the second signal, identify, in response to the identifying of the biometric information, at least portion of the user authentication signal from the identified second signal, and store, in response to the identifying the at least portion of the user authentication from the received second signal, the identified biometric information in the memory.