IC card system having a function of authenticating destroyed data
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 9, 1993
Grant Date -
N/A
app pub date -
Mar 8, 1991
filing date -
Jul 26, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
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.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully