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Fat32 file system data encryption method

A FAT32, data encryption technology, applied in the field of information security, can solve the problem of not being able to dynamically adjust the size and space of the encrypted part and the non-encrypted part, and achieve high practical value and reduce storage waste.

Active Publication Date: 2018-01-12
BEIJING HANGXING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of the partition, the size space of the encrypted part and the non-encrypted part cannot be dynamically adjusted

Method used

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  • Fat32 file system data encryption method
  • Fat32 file system data encryption method
  • Fat32 file system data encryption method

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Experimental program
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Embodiment Construction

[0014] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] see Figure 1-Figure 3 , the embodiment of the present invention provides a kind of FAT32 file system data encryption protection method, it comprises the steps:

[0016] Pre-receiving step, before the FAT32 file system is stored in the storage medium, the FAT32 file system data information is intercepted, and the FAT32 file system data information includes FAT table, DBR area and data domain data;

[0017] The address data parsing step receives the FAT32 file system data information sent by the pre-receiving step, and parses to separate the data domain area from the FAT table and the DBR;

[0018] Specifically, the method of parsing data in the address data parsing step needs to parse and judge, part data in the data field and part data in the non-data field, so as to define whether the data in this part of the FAT32 file syst...

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PUM

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Abstract

The invention discloses a data encryption method for an FAT32 file system and relates to the field of information security and data storage. Compared to the traditional encryption of FAT32 file systems, the method is characterized in that a plaintext portion and a ciphertext portion are decrypt-indexed and encrypt-indexed by a special FAT (file allocation table). According to the method, the plaintext and the ciphertext are subjected to decrypt-indexing and encrypt-indexing management by the same FAT; by dynamically distributing the sizes of a plaintext area and a ciphertext area in a uniform partition, storage waste caused by separate storage of the plaintext and the ciphertext is reduced; the method has high practical value.

Description

technical field [0001] The invention belongs to the fields of information security and data storage, and in particular relates to a data encryption protection method for the currently widely used FAT32 file system. Background technique [0002] With the rapid development of information technology, more and more information is stored in the form of computer files, such as FAT32 files. With the convenience of informatization storage, the issue of storage security has attracted more and more attention. [0003] In the prior art, files are encrypted to enhance storage security. However, while enhancing storage security, it also brings some inconvenience: for example, the encryption method of the FTA32 file system is only analyzed for partitions to determine the encryption of encrypted data. way of technical range. In actual use, the traditional way, that is, the way of demarcating the encryption range for partitions will bring some inconvenience to use. For example, when the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/60G06F17/30
CPCG06F16/1737G06F21/602G06F2221/2107
Inventor 杨举岷刘海殷国良
Owner BEIJING HANGXING TECH