| 摘要 |
PCT No. PCT/FR87/00397 Sec. 371 Date Jun. 1, 1988 Sec. 102(e) Date Jun. 1, 1988 PCT Filed Oct. 13, 1987 PCT Pub. No. WO88/02900 PCT Pub. Date Apr. 21, 1988.The storage cells are grouped into elements grouping at least two cells, each element being locatable by an address and having a parity. The balance of the card is the number of non-zero even elements with an address below the address of the odd element with the lowest address and which is called the "terminal". In order to debit the card and reduce said balance, the terminal is moved towards a lower address, while creating a new old element of lower address than the terminal to be displaced. In order to credit the card and increase this balance, the terminal is moved towards a higher address, while again giving to possible odd elements with a higher address than the terminal to be displaced an even character and while creating a new odd element with a higher address than the terminal to be displaced.
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