公开(公告)号：JPH10301854A

公开(公告)日：1998-11-13

申请号：JP7476798

申请日：1998-03-24

Applicant: IBM

Inventor： DEINDL MICHAEL ,  HAENEL WALTER ,  ALBERT SCHARRE

IPC: G06F12/14 ,  G06F9/445 ,  G06F12/00 ,  G06F21/24 ,  G06K17/00 ,  G06K19/073 ,  G07F7/10

Abstract: PROBLEM TO BE SOLVED: To prevent the import of information to the non-permitted area of a chip card memory and to reinforce the security standard of a chip card by activating the change of the contents of the chip card memory in the case that matching is established between an electronic fingerprint and at least one other electronic fingerprint at the time of comparison. SOLUTION: This chip card is put into a terminal and the function of the terminal for transferring a command code to the chip card is selected. After writing the command code to a binary file A102, the binary file A102 is marked as inactive. The electronic fingerprint calculated on the chip card is compared with a fingerprint arranged inside a registration file 3F01 by a card supplier. In the case that matching with one of the other electronic fingerprints is established, the command code inside the binary file A102 is activated. That is, use is made possible by the context of an application A100.

公开(公告)号：JP2000047945A

公开(公告)日：2000-02-18

申请号：JP16036099

申请日：1999-06-08

Applicant: IBM

Inventor： ALBERT SCHARRE ,  SCHERZER HELMUT ,  SCHILLING MICHAEL

IPC: G06F12/14 ,  G06F11/00 ,  G06F21/60 ,  G06F21/62 ,  G06K19/073 ,  G07F7/10

Abstract: PROBLEM TO BE SOLVED: To guard against the intelligence report of secret information by resetting a counter value to a start value when a prescribed event occurs and preventing the usage of secret information when the value reaches the max. value. SOLUTION: The starting position A of a counter is provided with a prescribed starting value A. The value is increased by a specified value (the state B of the counter) at the time of the respective occurrences of code usage. When the counter value exceeds a specified and prescribed max. value (the final state C of the counter) by the input of the specified event (b), access to the code is prevented. A function protected by the code cannot be executed. A prescribed event (c) for resetting the counter to be the start state A in a prescribed starting value exists concerning the respective codes. When the event (c) occurs, the counter is automatically reset to be in the starting state unless the state reaches the ending state (c).