Log backup method and device and smart card

Abstract

The invention discloses a log backup method, a log backup device and a smart card. By the method and the device, the backup speed of data in the smart card is improved, and a memory consumed by data backup is reduced. The log backup method comprises the following steps of: dividing communication data corresponding to the current service communication into a plurality of log sub-items, and caching the log sub-items to a volatile storage medium; and when the current service communication is finished, writing the log sub-items cached in the volatile storage medium in the corresponding backup area in a non-volatile storage medium at one time.

Description

technical field [0001] The invention relates to the communication field, in particular to a method for realizing log backup, a device thereof, and a smart card. Background technique [0002] At present, after using smart cards for data transactions (ie, business communications), it is necessary to back up the transaction data (ie, communication data) for subsequent operations such as data recovery; in order to protect the security of the backup data, how can It is particularly important to ensure the data security of the smart card. If the data in the smart card is lost or restored inaccurately, it may cause various problems during the use of the smart card, and in severe cases, the smart card may not be usable. At present, with the rapid development of smart cards, the performance of different types of smart cards varies widely, but in general, the operating systems used by smart cards are COS systems, and COS systems are relatively stable on some smart cards but not on so...

AI Technical Summary

Problems solved by technology

[0010] (1) Each sub-log item of the communication data is directly written into the non-volatile storage medium in turn. Therefore, it is necessary to perform multiple read or write operations on the non-volatile storage medium, which not only consumes a large memory, but also And the backup time is longer;

[0011] (2) A corresponding check value is set for each sub-log item of the communication data. Therefore, when the subsequent power failure occurs, when restoring the data in the backup area of ​​the non-volatile storage medium, it is necessary to check the value of each sub-log item. The check value is checked to determine the recoverable sub-log items and the unrecoverable sub-log items; the data recovered by the existing power-off protection method may not be complete. For a data transaction, if If the recovered communication data is incomplete, it cannot be used; therefore, the existing power-down protection method not only cannot ensure the atomicity (ie integrity) of the recovered data, but also has low fault tolerance

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