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Method for file security of NAND Flash, as well as device and system thereof

A technology of a file system and a security method, applied in the field of communication, can solve the problems of poor file system security, poor NAND Flash file system security, poor NAND Flash file system security, etc., and achieve the effect of improving security.

Inactive Publication Date: 2010-04-14
SHANGHAI HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] General-purpose NAND Flash file system (as YAFFS / JFFS file system) in the prior art generally directly writes described file system information into the spare area of ​​NANDFlash when writing file system information to NAND Flash, and these file system information are in standby How to store in the area is open, so that people can easily analyze the file organization on the NAND Flash file system based on the file system information, and then recover the complete file system data, making the security of the NAND Flash file system more secure. Difference
[0007] At present, file systems (such as NTFS file systems) on some hard disks improve file system security by encrypting file system data, but the method for encrypting file system data is not suitable for embedded systems, so The NAND Flash file system used in embedded systems cannot use this method to solve the problem of poor file system security
[0008] As can be seen from the above, the security of the NAND Flash file system applied to embedded systems in the prior art is relatively poor

Method used

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  • Method for file security of NAND Flash, as well as device and system thereof
  • Method for file security of NAND Flash, as well as device and system thereof
  • Method for file security of NAND Flash, as well as device and system thereof

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Embodiment Construction

[0026] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0027] The embodiment of the present invention provides a file security method, device and embedded system of NAND Flash.

[0028] refer to figure 1 , showing a schematic flow chart of Embodiment 1 of the NAND Flash file security method provided by the embodiment of the present invention, as figure 1 Shown, the file security method ...

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Abstract

The embodiment of the invention provides a method for file security of NAND Flash, as well as a device and a system thereof. The embodiment of the method for file security of NAND Flash comprises: receiving file system information which is sent by an NAND Flash file system and is used for storing; encrypting the file system information; and storing the encrypted file system information in the NAND Flash. The embodiment of the invention improves the safety of the NAND Flash file system used for an embedded system.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method, device and embedded system for keeping files secret of NAND Flash. Background technique [0002] NAND flash memory (NAND Flash) is a non-volatile semiconductor memory that can be electrically erased online. It has the advantages of fast erase and write speed, low power consumption, large capacity, and low cost. It has been widely used in the field of embedded systems. . [0003] A NAND Flash is composed of many blocks (BLOCK), and each block is composed of a certain number of pages (PAGE). Generally speaking, a page consists of a 2K-byte data (data) area and a 64-byte spare (Spare) area, wherein the data area is used to store file data information, and the spare area is used to store data-related file system information. As shown in Table 1: [0004] 2048byte 64byte file data information file system information [0005] Wherein, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 祝建华
Owner SHANGHAI HUAWEI TECH CO LTD
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