Communication system, communication apparatus and communication method as well as program

A communication method comprising:

• sending a random number and a first communication information including first identification information of a communication apparatus to another communication apparatus by using near field communication;
• receiving second communication information including second identification information of the other communication apparatus necessary to a second communication from the other communication apparatus by using near field communication;
• and
• performing the second communication between the communication apparatus and the other communication apparatus by using the second communication information received by using the near field communication.

A communication method comprising:

• receiving a random number and first communication information including first identification information of another communication apparatus from the other communication apparatus by using near field communication;
• sending second communication information including second identification information of a communication apparatus necessary to a second communication to the other communication apparatus by using near field communication;
• and
• performing the second communication between the communication apparatus and the other communication apparatus by using the first communication information received by using the near field communication.