File management system and method based on USBKey platform

A technology of a file management system and a file management method, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as limited FLASH space and RAM space, unusable file system structure, and difficulty in USBkey file management. To achieve the effect of convenient creation and safe management

Inactive Publication Date: 2014-07-23
DYNAMICODE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Due to the resource limitation of the USBKey chip, the FLASH space and RAM space are very limited, and the file system structure similar to FAT cannot be used, and the file resources can only be managed in a proprietary way, which brings great difficulties to the USBkey file management.

Method used

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  • File management system and method based on USBKey platform
  • File management system and method based on USBKey platform
  • File management system and method based on USBKey platform

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Embodiment Construction

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0034] Aiming at the USBKey platform, the present invention provides a file management system adopting a tree file structure. The file management system efficiently utilizes limited chip resources, and can effectively and safely create, delete, and use files.

[0035] see figure 1 , which shows a schematic diagram of the tree-shaped file directory structure in the file management system. In the tree file structure, the root of the tree is the entry of the entire file management system, which is the master file MF (Master File). The main file MF is the root directory, and the root directory is the base directory that is created first. Only when MF is created can other DDF (Directory Definition File), ADF (Application Definition File) and EF...

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Abstract

The invention discloses a file management system and method based on a USBKey platform. A tree-form file structure is adopted in the file management system, and a root in the tree-form file structure is a main file which serves as an entrance of the whole file management system; each nonleaf node serves as a dedicated file and is used for recoding a file access path; leaf nodes serve as basic files and are used for storing specific data. According to the file management system, a main space and a free space are used for managing files, wherein the main space is the residual space of the file management system, and the free space is the space which can be recycled by linking deleted files through a chain table. According to the scheme, the limited chip resources of a USBKey can be used efficiently, the files can be managed safely, and creating, deleting and using can be conducted quite safely and conveniently.

Description

technical field [0001] The invention relates to the technical field of USBKey, in particular to the file management technology based on the USBKey platform. Background technique [0002] USB Key is a hardware device with USB interface. It has a built-in single-chip microcomputer or smart card chip, has a certain storage space, can store the user's private key and digital certificate, and uses the built-in public key algorithm of the USB Key to realize the authentication of the user's identity. Since the user's private key is stored in the password lock, theoretically it cannot be read by any means, thus ensuring the security of user authentication. [0003] With the widespread popularization of online banking services and the rapid development of USBKey, the management of file resources has become more and more important, and the efficiency and security of file management have received more and more attention. [0004] Due to the resource limitation of the USBKey chip, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30G06F21/34
CPCG06F16/122G06F21/34
Inventor 沈勇坚王翔平胡永刚
Owner DYNAMICODE
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