Abstract:
Disclosed is a method of allowing a main terminal to communicate with a portable terminal comprising first and second secure elements. The method includes: allowing the main terminal to communicate with the portable terminal by using a first applet identifier which is previously recorded in the main terminal; and allowing the main terminal to communicate with the portable terminal by using a second applet identifier which is previously recorded in the main terminal, wherein allowing the main terminal to perform the communication by using the first applet identifier and the allowing the main terminal to perform the communication by using the second applet identifier are alternately and repeatedly carried out.