Logic card reading and writing method and system

Abstract

The invention relates to a logic card reading-writing method and a logic card reading-writing system. The method comprises the following steps: reading a logic card to obtain the user data of the logic card; determining a reading region or a writing region to which each dynamic information region belongs according to the backup mark of each dynamic information region in the user data; calculating according to data of the reading region to obtain a transaction authentication code, comparing the transaction authentication code with a transaction authentication code stored in the reading region or a transaction authentication code stored in the writing region, and if the transaction authentication codes are the same, calculating according to service data to obtain dynamic information comprising a new transaction authentication code; writing the dynamic information comprising the new transaction authentication code into the writing region, and updating the backup mark of the writing region. By adopting the method and the system, alternate reading and writing of the dynamic information region are realized, the problem of failure in the logic card due to card writing failure is solved, and the probability of abnormal processing specific to the card writing failure is lowered.

Description

technical field [0001] The invention relates to the field of electronic card processing, in particular to a logic card reading and writing method and system. Background technique [0002] In automatic ticketing rail transit, logical cards, such as one-way ticket cards and ordinary stored-value cards, are widely used. When entering and exiting gates, logical cards are frequently read and written, but because logical cards are not like CPU (Central Processing Unit, central Processor) card contains an operating system. When the reader writes to the CPU card, the CPU card will write the content into the card only in the last interaction. This mechanism ensures that the data written to the card is complete and correct, and the logic card is Structural characteristics, writing to the card must be written page by page or block by block, and the data size of each write card often exceeds the size of one page or one block of the logic card, requiring multiple pages or blocks of space...

AI Technical Summary

Problems solved by technology

[0003] Based on this, it is necessary to provide a logic card reading and writing method for the problem that the traditional logic card fails to write to the card and the data in the card is changed, so that the logic card cannot be used and needs to be handled abnormally. The probability that the logic card cannot be used due to the modification of the data in the card requires exception handling

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