File content hidden storage access method and storage device based on capacity hiding and multi-file system

Abstract

The invention relates to a file content hidden storage access method based on capacity hiding and a multi-file system and a device of the method. The method comprises the specific steps that first, a capacity request command sent by a master device is monitored through a monitoring unit in a slave device, and the slave device end analyzes a master device access command; if the master device access command is for normal access to a storage area, capacity identification information for normal access to the storage area is fed back to the master device; if the received master device access command is for hidden access to the storage area, identity recognition is needed, and corresponding capacity identification information for hidden access to the storage area i is fed back to the master device after identity recognition is passed; a data elimination function is also provided, wherein when the hidden system is attempted to be cracked, a self-destruction module of a mobile storage device will be triggered to thoroughly eliminate secret files in the hidden area. Through the method, the problems that the stability of the hidden files is affected by an operating system and the hidden files are destroyed by attackers can be effectively solved, and therefore the security of hidden storage file data is effectively guaranteed.

Description

technical field [0001] The invention belongs to the technical field of mobile storage security, in particular to a file content hidden storage access method based on capacity hiding and multi-file system and a storage device thereof. Background technique [0002] Mobile storage devices with USB interface are more and more widely used, such as U disk, which has become a transfer station for data transmission and plays an important role in data exchange between computers. At the same time, data security issues have become increasingly prominent. Personal important file information is often stolen or destroyed, and hidden storage of file content is often used as an important method to protect sensitive data information. Research in security is booming. [0003] The existing file hiding technologies mainly include the following types: modify the registry so that users cannot see hidden files through ordinary file operations; use images, videos and other files as host files to h...

AI Technical Summary

Problems solved by technology

The method of hosting the file in the host file is easily affected by the operation of the host file, and the robustness is too poor; while the method of using the characteristics of the memory chip to hide the file has better hiding strength, but the hiding capacity is not large, and it is easy to affect the bad block of the chip Management; the method of using the redundant area of ​​the file to hide the file has strong concealment, but its robustness is poor, the hidden capacity is small, and it is easily affected by the file operation; several other methods are based on the host-side technology, such as Filter driver, modify file attributes, reconstruct FAT table, etc.

In addition, existing file hiding methods rely on operating system implementation and are not suitable for mobile storage devices

The above file hiding methods have two main disadvantages: (1) the imperceptibility of hidden files is not considered, that is, it is easy for attackers to know the existence of hidden files, thereby stealing hidden files; (2) hidden files are easily affected by file operations, as formatted device

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