Method of authenticating user and electronic device supporting the same

A method of authenticating a user by an electronic device, the method comprising:

• acquiring at least one piece of first bio-information related to a part of a body of the user through a sensor;
• creating at least one piece of identification (ID) information based on the at least one piece of the first bio-information;
• setting at least one of at least one key value or at least one parameter value used for generating at least one one-time password (OTP) by using the at least one piece of ID information;
• generating the at least one OTP by using the at least one key value and the at least one parameter value;
• and
• transmitting the at least one OTP to at least one external device.

An electronic device comprising:

• a housing:
• a display that is exposed through one surface of the housing;
• a biometric sensor mounted in a portion of the housing;
• a wireless communication circuit;
• at least one processor electrically connected with the display, the biometric sensor, and the wireless communication circuit;
• and
• a memory electrically connected with the processor and configured to store bio-information of a user,
• wherein the memory stores instructions that, when executed, cause the at least one processor to:
• acquire first bio-information of the user by using the biometric sensor,
• compare the first bio-information with second bio-information which is stored in the memory,
• select or create first information based on a comparison result,
• generate a number based on the first information, second information related to the electronic device, and time information,
• transmit the number to an external server through the wireless communication circuit, and
• receive a response related to the number from the external server through the wireless communication circuit.