System and method for locking and unlocking an application in a smart card
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United States of America Patent
Stats
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Aug 14, 2001
Issued Date -
N/A
app pub date -
Aug 3, 2000
filing date -
Mar 5, 1998
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Locking and unlocking an application in a smart card allows for automatic authenticity of a lock or unlock command without the need for a personal identification number (PIN). The smart card is locked and unlocked by using a smart card device that need not have a keypad. A lock command is sent from the device to the smart card. An application on the smart card is locked. The smart card sends identifying information, such as a password and a card identification number, to the device which is stored in a cache. To unlock, the smart card is inserted into the device and an unlock button is pressed. The smart card device reads the card identification number of the card and determines if the corresponding password for that card is present in the cache. If so, an unlock command is issued to the smart card along with the password.
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