公开(公告)号：US5185798A

公开(公告)日：1993-02-09

申请号：US663950

申请日：1991-03-08

申请人： Hiromi Hamada ,  Kazuya Hirano ,  Young S. Lee

发明人： Hiromi Hamada ,  Kazuya Hirano ,  Young S. Lee

IPC分类号： G07F7/08 ,  G06K17/00 ,  G06K19/073 ,  G06K19/12 ,  G07F7/10

CPC分类号： G07F7/1008 ,  G06K17/0022 ,  G06K19/073 ,  G06K19/12 ,  G06Q20/341 ,  G06Q20/355 ,  G06Q20/3672 ,  G06Q20/3676 ,  G07F7/082

摘要： An IC card includes, in addition to an ordinary data recording processing circuit, an IC chip area including an encrypting circuit, and a magnetic or optical data recording unit mounted thereon. Those items of data at an initialization and final transaction times are recorded in the magnetic or optical data recording unit while a predetermined encryption is made in cooperation with the IC chip area and the terminal for initialization and terminal for transaction. When a data item to be recorded n the IC chip area in the IC card is destroyed, data items recorded on the magnetic or optical data recording area are decrypted to check if the recorded data items are true. If yes, these data items are restored in a new card.