A communication apparatus for performing a communication parameter configuration process as one of a communication parameter providing apparatus and a communication parameter receiving apparatus, characterized by comprising: receiving means for receiving signals transmitted from another communication apparatus; transmission means for transmitting, in a case where the communication apparatus operates as the communication parameter providing apparatus, a probe response signal as a response to a probe request signal from the another communication apparatus that has been received by the receiving means; display means ; and communication parameter providing means for providing the communication parameter to the another communication apparatus; wherein the probe request signal constitutes a search signal for a communication parameter providing apparatus; wherein the probe response signal includes information indicating that the communication apparatus is operating as the communication parameter providing apparatus, the probe response signal further includes information indicating that the communication apparatus functions as a display apparatus for displaying a password to be used in an authentication process performed in the communication parameter configuration process; wherein the display means is configured to display the password; and wherein the communication parameter providing means is configured to provide the communication parameter to the another communication apparatus in a case that a first hash value based on the password, said first hash value being transmitted by the another communication apparatus after display of the password by the display means and received by the receiving means, matches a second hash value which is based on the password displayed by the display means. receiving means for receiving signals transmitted from another communication apparatus; transmission means for transmitting, in a case where the communication apparatus operates as the communication parameter providing apparatus, a probe response signal as a response to a probe request signal from the another communication apparatus that has been received by the receiving means; display means ; and communication parameter providing means for providing the communication parameter to the another communication apparatus; wherein the probe request signal constitutes a search signal for a communication parameter providing apparatus; wherein the probe response signal includes information indicating that the communication apparatus is operating as the communication parameter providing apparatus, the probe response signal further includes information indicating that the communication apparatus functions as a display apparatus for displaying a password to be used in an authentication process performed in the communication parameter configuration process; wherein the display means is configured to display the password; and wherein the communication parameter providing means is configured to provide the communication parameter to the another communication apparatus in a case that a first hash value based on the password, said first hash value being transmitted by the another communication apparatus after display of the password by the display means and received by the receiving means, matches a second hash value which is based on the password displayed by the display means. <EOS>