Wear-leveling power-down data protection method for smart card

A data protection and wear-balancing technology, which is applied in the direction of data error detection and response error generation in electrical digital data processing and calculation, and can solve the problems of data confusion, scrapping, and shortened life span in the card.

Active Publication Date: 2018-04-24
WUHAN RUINAJIE ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a high-security data carrier, smart cards often face data modification in applications. Due to the physical characteristics of its non-volatile memory, it needs to be erased before writing. Once the power is accidentally lost during the writing process, it may It will cause confusion and loss of data in the card, and even the card will be scrapped in severe cases...

Method used

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  • Wear-leveling power-down data protection method for smart card
  • Wear-leveling power-down data protection method for smart card
  • Wear-leveling power-down data protection method for smart card

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Embodiment Construction

[0018] The following combination Figure 1 to Figure 3 Specifically, a wear-balancing smart card power-off data protection method provided by the present invention is described.

[0019] Such as Figure 1-3 As shown, the present invention provides a smart card power-down data protection method for balancing wear and tear, and opens up a backup area, which includes a backup mark area and a backup data area; the backup data area includes a plurality of backup data storage areas , the first area of ​​the backup mark is composed of each mark record item, and the mark record item is composed of the number of backup records and the backup state mark, corresponding to a unique index value, and the index value and the backup data storage area are corresponding through a mapping mechanism and associated; the index value is used to link the corresponding starting address of the backup data storage area, and the backup status mark is used to display the corresponding backup tag record i...

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Abstract

The invention belongs to the technical field of radio frequency electronic application, and particularly relates to a wear-leveling power-down data protection method for a smart card. Every time new current affair write data backup is opened, marked record items which are in a first backup mark zone and in a used backup state can be detected and skipped, then following detection continues to be conducted till the first marked record item which is in an available backup state currently is found, and the index value of the first marked record item is marked as i. In this way, the initial addressof the current affair write data backup is mapped to the next sector start of backup data, the situation is avoided that frequent erasing is conducted due to backup write, accordingly, the severe wear to a certain fixed sector is caused and the service life of the smart card is reduced, and the wear-leveling aim is achieved.

Description

technical field [0001] The invention belongs to the technical field of radio frequency electronic applications, and in particular relates to a power-off data protection method for a smart card with balanced wear. Background technique [0002] With the development of microelectronics technology and semiconductor technology, the smart IC card that came out stands out from the traditional IC card with its overwhelming advantages and quickly penetrates into all walks of life in our lives, among which SIM cards, bank cards, municipal Cards, social security cards, access control cards and other forms of existence are the most common. As a high-security data carrier, smart cards often face data modification in applications. Due to the physical characteristics of its non-volatile memory, it needs to be erased before writing. Once the power is accidentally lost during the writing process, it may It will cause confusion and loss of data in the card, and even the card will be scrapped...

Claims

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Application Information

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IPC IPC(8): G06F11/14
CPCG06F11/1456G06F11/1458
Inventor 邓勇吴水源徐文涛刘宇张明宇
Owner WUHAN RUINAJIE ELECTRONICS TECH
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