Registers – Systems controlled by data bearing records – Credit or identification card systems
Patent
1990-10-26
1993-04-20
LaRoche, Eugene R.
Registers
Systems controlled by data bearing records
Credit or identification card systems
235379, 235380, 235492, 34082534, G06K 500
Patent
active
052045129
ABSTRACT:
System for controlling communication between electronic information cards, such as IC-cards and a host computer, to be kept in secret. In order to protect the data, various countermeasures have been proposed in which the data are enciphered to be sent and deciphered for reading out. There is a problem, however, the cyphograph is difficult to keep secret when it is used for a long time. The invention intends to provide a device having at least two connectors for an IC-card stored with an algorithm for enciphering the data and another IC-card or other IC-cards for making communication with the host computer so as to readily change the first IC-card with a new one storing another algorithm.
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Ieki Toshiharu
Kobayashi Niichi
Kobayashi Takafumi
Shimamura Norio
Watanabe Takeshi
LaRoche Eugene R.
Nguyen Tan
NTT Data Communications System Corporation
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