The present invention prevents a third party's impersonation while wireless communication is established for security setting. An access point, which performs a security setting process for wireless communication with a wireless LAN terminal by means of wireless communication, receives a start instruction for the security setting process and wirelessly receives start instruction data that indicates the start of the security setting process. The security setting process is not performed if the start instruction data is received before the receipt of the start instruction. The security setting process is performed if the start instruction data is not received before the receipt of the start instruction.