Electronic device for including signature in electronic document and method of controlling the same

A method of processing an signature, the method comprising:

• receiving an electronic document from at least one server;
• obtaining biometric information associated with a user;
• transmitting the biometric information associated with the user to the at least one server;
• obtaining a signature of the user associated with the electronic document;
• encrypting the obtained signature with specified data associated with the biometric information;
• and
• transmitting the encrypted signature to the at least one server together with the electronic document or identification information of the electronic document.

An electronic device comprising

• an input device;
• a biometric sensor;
• a communication circuit;
• a memory;
• and
• at least one processor electrically connected to the input device, the memory, the biometric sensor, and the communication circuit,
• wherein the memory stores a plurality of instructions that, when executed, causes the at least one processor to:
• obtain biometric information of a user by using the biometric sensor;
• transmit data associated with the biometric information of the user to at least one server by using the communication circuit;
• obtain personal identification number (PIN) information by using the input device;
• encrypt the obtained PIN information of the user with specified data associated with the biometric information;
• and
• transmit the encrypted PIN information to the at least one server by using the communication circuit.