公开(公告)号：JP2000259571A

公开(公告)日：2000-09-22

申请号：JP5696399

申请日：1999-03-04

Applicant: IBM

Inventor： HORIKOSHI HIDETO ,  ABE NAOKI ,  TANAKA JUN ,  MARUICHI TOMOKI

IPC: G06F1/00 ,  G06F1/26 ,  G06F11/30 ,  G06F15/00 ,  G06F21/00 ,  G06F21/20

Abstract: PROBLEM TO BE SOLVED: To prevent illegal access to a non-contact data carrier system by using a radio frequency identification(RFID) computer, for example, without lowering a performance. SOLUTION: A RFID computer 30 is provided with a CPU 35, an EEPROM 34, communication equipment 31 and 32 and power control units 40 and 41. When the RFID computer 30 in power-on state is passed through a portal gate provided in the entrance/exit of an illegal access prevention zone without authority, that portal gate transmits a signal for setting on a tamper bit 44 in the EEPROM 34. The EEPROM 34, which sets on the tamper bit 44 with this signal, outputs a tamper bit interrupt request signal. The power control units 40 and 41, which receive this signal, turn off the power of the RFID computer 30.