Realization method of data encryption in hard disk

A data encryption and realization method technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as poor product compatibility, inaccessible data, troubles, etc., to save equipment use costs, reduce learning costs, Ease of use

CN102053925AInactive Publication Date: 2011-05-11许燕
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2011-05-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a realization method of data encryption in a hard disk, comprising the following steps: monitoring the status of a USB (universal serial bus) Key in real time, performing identity authentication by using an authorized USB Key and obtaining a secret key; storing the protected data in a protected catalog, mapping the space of the protected catalog into a virtual disc when the authorized authentication is successful, encrypting the data written into the disc and deciphering the data read from the disc; using an unprotected catalog as the common disc catalog; and hiding the virtual disc to prevent the access of the protected catalog and the protected data when the authorized USB Key is absent. The data stored in the virtual disc storage area of the protected catalog is encrypted forever, and is automatically decrypted in a memory when being used by a user. The method provided by the invention has the advantages that various discs and various file system can be supported, the traditional data use habit and application program behavior are not changed, and users do not need to purchase new disc devices.
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Description

Technical field

[0001] The invention relates to a method for realizing encryption of hard disk data, mainly realizing automatic encryption and decryption protection of user hard disk data. Enable users to achieve automatic encryption and decryption of hard disk data without adding new system hardware facilities and changing traditional data usage habits, improve information security, prevent information leakage, and achieve For safe storage purposes. The method obtains the key from the USB Key and performs identity authentication, uses virtual disk technology to realize real-time transparent encryption and decryption of data; uses file filtering driver technology to realize virtual disk storage file protection; this method specifies a protected directory on the hard disk, and this directory The user cannot access it arbitrarily; when the USB Key exists, use the virtual disk technology to map the virtual disk storage files in the directory space to a disk for the user to use, ...

Examples

Embodiment Construction

[0034] In order to describe in detail the structure of the present invention and the effect achieved, the following preferred embodiments are now given and described as follows in conjunction with the accompanying drawings:

[0035] figure 1 In , applications and user operations interact with the system file interface, and the system file interface converts the request into a kernel state file service request. These requests are first sent to the file system driver, the file system driver transfers the request to the file system filter driver, and the filter driver filters the file request, the unauthorized file request will be directly rejected, and then the authorized request is distributed to the corresponding disk Device driver; after the virtual disk receives the access request, it maps the request and then transfers it to the actual disk driver; the filter driver and the virtual disk driver operate according to the current state of the HID USB Key. If the Key does not e...