Realization method of data encryption in hard disk

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.

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, ...

AI Technical Summary

Problems solved by technology

Because some operations are not disclosed, the stability of the product is poor

[0005] 2: When the operating system is upgraded, the file system is often optimized, and these optimizations often cause the product to be unusable, resulting in poor product compatibility

[0006] 3: All data in the space in the protected directory is encrypted, including the directory structure. Once the directory is accessible, the data can be accessed, so data backup is more troublesome

[0008] 1: The disk file is an ordinary data file, and there is a risk of accidental damage. Once the file is damaged, all data will be inaccessible

[0009] 2: The appearance and disappearance of the disk cannot be automated, and the user needs to manually start and uninstall, which is troublesome

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