GAME SYSTEM

PROBLEM TO BE SOLVED: To reduce the risk of leakage of authentication information as much as possible when storing the authentication information for mutual authentication.SOLUTION: As authentication information for mutual authentication, SID of a CU communication control part 80 is stored in a ROM of the CU communication control part 80 in a chip manufacturing stage. The SID of a main control part 323 is stored in the CU communication control part 80 in CU manufacture. The SID of the CU communication control part 80 is downloaded from a key management server 800 and is stored in the main control part 323 as authentication information.SELECTED DRAWING: Figure 6 【課題】相互認証用の認証用情報の記憶に際して極力認証用情報の漏洩のリスクを少なくすること。【解決手段】相互認証用の認証用情報として、ＣＵ通信制御部８０のＳＩＤをＣＵ通信制御部８０のＲＯＭにチップ製造段階で記憶させ、メイン制御部３２３のＳＩＤをＣＵ製造時にＣＵ通信制御部８０に記憶させ、メイン制御部３２３には、認証用情報としてＣＵ通信制御部８０のＳＩＤを鍵管理サーバ８００からダウンロードして記憶させる。【選択図】図６