IC card and power failure prevention data backup method or data recovery method thereof

Abstract

The invention relates to the technical field of IC cards. The invention relates to an IC card, in particular to an IC card, an IC card power failure prevention data backup method and an IC card powerfailure prevention data recovery method. The IC card power failure prevention data backup method comprises the following steps: organizing data to be backed up into a record strip form, and sequentially recording the record strip to a data backup area from front to back from a first record strip so as to execute data backup of a current transaction, and enabling a transaction factor of the currenttransaction to participate in CRC calculation of the record strip; and after the transaction is submitted, updating the transaction factor of the transaction recorded in the transaction factor storage area. According to the method and the device, the execution efficiency of IC card data backup can be improved, and the situation of abnormal recovery of wrong records in the IC card is prevented.

Description

Technical field [0001] This application relates to the field of IC card technology, and in particular to an IC card, an IC card anti-power-down data backup method, and an IC card anti-power-down data recovery method. Background technique [0002] Financial IC card, also known as chip bank card, is a bank card with chip as the medium. The chip bank card has a large capacity and can store information such as keys, digital certificates, fingerprints, etc. Its working principle is similar to that of a microcomputer and can have multiple functions at the same time, thus providing cardholders with the convenience of one card with multiple uses. Financial IC cards are issued by commercial banks (credit unions) or payment institutions. They use integrated circuit technology, follow national financial industry standards, and have all or part of the financial functions of consumer credit, transfer and settlement, cash deposit and withdrawal, as well as other commercial functions. Service ...

AI Technical Summary

Problems solved by technology

When the number of backup record entries is small, the operation of clearing the CRC can have little impact on the performance of the chip, but if there are a large number of backup record entries, such as hundreds of records, the operation of clearing the CRC one by one will be greatly affected. The loss of time causes the processing performance of the chip's overall anti-power-off backup mechanism to be greatly reduced.

[0010] Moreover, the continuous CRC erasing operation itself also needs to be backed up, so many unnecessary risks will be introduced, for example, if there is a problem with the backup mechanism against power failure, or if the CRC is not completely erased, leaving valid backups in the backup area Record

In this case, it is very likely that some records that do not want to be restored by rollback are restored by mistake, resulting in abnormal data in the financial IC card, and the financial IC card cannot work normally.

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