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Encrypting file system, encrypting method and deciphering method based on EXT2 file system

An encrypted file system and file system technology, applied in the field of encrypted file system, can solve the problems of file encryption and low data security, and achieve the effect of improving security

Inactive Publication Date: 2013-04-24
SHENZHEN STATE MICRO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For example, the EXT2 file system commonly used in the embedded field provides storage and organizational file and data management, files and data are stored in a transparent manner, and it cannot encrypt files, resulting in low data security

Method used

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  • Encrypting file system, encrypting method and deciphering method based on EXT2 file system
  • Encrypting file system, encrypting method and deciphering method based on EXT2 file system
  • Encrypting file system, encrypting method and deciphering method based on EXT2 file system

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Experimental program
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Embodiment Construction

[0040] Such as figure 1 As shown in the figure, it is a structural diagram of organizing data on the storage device by the EXT2 file system. When formatting, first divide multiple block groups according to the capacity of the storage device, and then each block group includes an independent super block, block group description table, block bitmap, file and directory index node bitmap, file and directory index Node table, and multiple data blocks.

[0041] The content of the file or directory index node entry records the attributes of the file or directory and the address of the data block where the actual data of the file or directory is placed. The specific record information is: access mode, owner and group, capacity size, time of creation or status change, last read time, last modified time, etc.

[0042] Such as figure 2 As shown, it is a structural diagram of organizing data on a storage device by the encrypted file system based on the EXT2 file system of the present ...

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Abstract

The invention discloses an encrypting file system based on an EXT2 file system. The encrypting file system based on the EXT2 file system comprises a plurality of block groups, and each block group comprises memory spaces corresponding to the data of a superblock, a block group description list, a block bitmap, a file and catalogue index node bitmap, a file and catalogue index node list and a plurality of data blocks. A plurality of block group description lists are stored in a memory space corresponding to the block group description list. Each block group further comprises a secret key index node bitmap which is arranged behind the file and catalogue index node list and a memory space corresponding to a secret key index node list. The memory space corresponding to the block group description list is further provided with a file system digital certificate (DC). By means of the encrypting file system based on the EXT2 file system, the security of the EXT2 file system is improved. The invention further provides an encrypting method and a deciphering method based on the EXT2 file system.

Description

technical field [0001] The invention relates to a file system storage data security technology, in particular to an encrypted file system based on an EXT2 file system, an encryption method and a decryption method. Background technique [0002] A file system is a method of storing and organizing files and data so that they are easily accessed and found. The file system usually uses storage devices such as SD card, U disk, hard disk, SPI FLASH, NOR FLASH, and NAND FLASH, and maintains the physical location of files in the device. At present, many file systems only have the function of managing files and data, but do not have the function of protecting files and data. If the product uses a transparent file system, when the product is lost, valuable data in the product may be illegally used. [0003] For example, the EXT2 file system commonly used in the embedded field provides storage and organization of files and data management, files and data are stored in a transparent ma...

Claims

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Application Information

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IPC IPC(8): H04L9/32H04L9/30H04L9/06
Inventor 陈金强
Owner SHENZHEN STATE MICRO TECH CO LTD
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