Patent ID: 8065519

Claim:
A wireless communication system comprising: a plurality of terminals that includes a first terminal and a second terminal and that is connected to at least one wireless network on the basis of authority of security configuration parameters shared by the plurality of terminals, wherein each of the first terminal and the second terminal includes operation status holding means for holding information on whether or not an operation status of the terminal itself has entered a revocation operation mode, and operation receiving means for shifting a mode of the terminal itself so that the operation status holding means indicates the revocation operation mode when receiving an operation for causing the terminal itself to enter the revocation operation mode, wherein the first terminal includes report signal receiving means for receiving a report signal indicating whether or not the second terminal has entered the revocation operation mode, and revocation request transmitting means for transmitting to the second terminal a revocation request for requesting revocation of the security configuration parameters of the second terminal when the report signal receiving means receives the report signal indicating that the second terminal entered the revocation operation mode within a predetermined period of time from the transition of the operation status of the first terminal to the revocation operation mode, wherein the revocation request transmitting means checks the position of the second terminal before transmitting the revocation request and transmits the revocation request only when the second terminal is located within a predetermined range, and wherein the second terminal includes revocation request receiving means for receiving from the first terminal the revocation request for requesting revocation of the security configuration parameters of the second terminal, and revocation executing means for revoking the security configuration parameters of the second terminal when the revocation request receiving means receives the revocation request when the second terminal has entered the revocation operation mode, wherein the revocation executing means checks the position of the first terminal before revoking the security configuration parameters of the second terminal and revokes the security configuration parameters of the second terminal only when the first terminal is located within a predetermined range.