A second information processing apparatus comprising: a control unit configured to cause the second information processing apparatus to output authentication key information for allowing a first information processing apparatus to make a wireless connection with the second information processing apparatus in order to conduct data transmission from the first information processing apparatus to the second information processing apparatus using wireless communication, and decide whether or not to allow the first information processing apparatus to make the wireless connection on the basis of authentication key information input into the first information processing apparatus and the output authentication key information, wherein, when there exist a plurality of first information processing apparatuses that conduct data transmission to the second information processing apparatus, the control unit is configured to cause authentication key information for every first information processing apparatus for allowing each of the plurality of the first information processing apparatuses to make the wireless connection on the basis of a designated rule to be output successively from the second information processing apparatus, and wherein the control unit is configured to decide a connection time for conducting data transmission to the second information processing apparatus on the basis of the number of the first information processing apparatuses, and to cause authentication key information for every first information processing apparatus to be output successively from the second information processing apparatus in a designated order to each of the plurality of first information processing apparatuses on the basis of the connection time. a control unit configured to cause the second information processing apparatus to output authentication key information for allowing a first information processing apparatus to make a wireless connection with the second information processing apparatus in order to conduct data transmission from the first information processing apparatus to the second information processing apparatus using wireless communication, and decide whether or not to allow the first information processing apparatus to make the wireless connection on the basis of authentication key information input into the first information processing apparatus and the output authentication key information, wherein, when there exist a plurality of first information processing apparatuses that conduct data transmission to the second information processing apparatus, the control unit is configured to cause authentication key information for every first information processing apparatus for allowing each of the plurality of the first information processing apparatuses to make the wireless connection on the basis of a designated rule to be output successively from the second information processing apparatus, and wherein the control unit is configured to decide a connection time for conducting data transmission to the second information processing apparatus on the basis of the number of the first information processing apparatuses, and to cause authentication key information for every first information processing apparatus to be output successively from the second information processing apparatus in a designated order to each of the plurality of first information processing apparatuses on the basis of the connection time. <EOS>