Method for storing data in a chip card rewritable memory
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United States of America Patent
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Nov 26, 2002
Grant Date -
N/A
app pub date -
Aug 16, 1999
filing date -
Feb 14, 1997
priority date (Note) -
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Abstract
A storage process that includes adding, to the elementary files of fixed length provided for by, e.g., ISO Standard 7816-4, elementary files of variable length whose capacity is always adapted to the size of the records they store, and managing this new type of file with micro-instructions complying with the formalism of ISO Standard 7816-4 and belonging to the proprietary class of instructions. By virtue of this new type of variable-length elementary file, it is possible to envisage new smartcards complying with ISO Standard 7816-4 and implementing data compression techniques at the data storage level, this capability being particularly beneficial considering the limited data storage capacities of a smartcard.
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