METHOD FOR STORING DATA IN A CHIP CARD REWRITABLE MEMORY

摘要

The invention concerns a storing method which consists in adding, to the elementary transparent (5) or record (4) files of fixed lengths designed by the ISO 7816-4 standard, elementary files of variable lengths (7) with capacity always adapted to the size of records which they store, and in managing this new type of files with micro-instructions observing the formalism of the ISO 7816-4 standard and pertaining to the class of owner instructions. This novel elementary file with variable length opens up the prospect of novel chip cards conforming to the ISO 7816-4 standard and using data compression techniques for data storage, which is particularly interesting in view of the limited storage capacity of a chip card.