Disk data connection chain-based file crushing method

Abstract

The invention provides a disk data connection chain-based file crushing method, which comprises the following steps of: looking up a file allocation table and a family address pointer through a file to be crushed; performing crushing deletion on the found file allocation table and the family address pointer; and overwriting the available space of a disk. According to the disk data connection chain-based file crushing method provided by the invention, through performing the crushing deletion on the file allocation table and the family address pointer, the file cannot be normally recovered, and a recovery tool cannot look up the crushed file through the stored information of the disk. On the basis, the file allocation table and the family address pointer in the disk and a free space are overwritten, and therefore, the file can be thoroughly cleared and crushed. Only a disk sector with an address pointer and the family address pointer in the file allocation table in the disk is overwritten, and therefore, not only is the crushing efficiency improved but also the damage risk of the disk is lowered.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to a file shredding method based on a disk data connection chain. Background technique [0002] Data security is one of the core issues of information security. Data security includes not only data encryption, access control, backup and recovery, etc. for the purpose of maintaining data integrity, but also data destruction for the purpose of completely destroying data integrity. . Data destruction refers to the use of various technical means to completely delete the data in the computer storage device, so as to prevent unauthorized users from using the residual data to restore the original data information, so as to achieve the purpose of protecting key data. Due to the different nature of information carriers, compared with paper documents, the destruction technology of data files is more complicated, the procedure is more cumbersome, and the cost is highe...

AI Technical Summary

Problems solved by technology

In order to meet the needs of users to completely delete files, some special so-called file shredding software appeared on the Internet, and some anti-virus software also added the file shredding function, but most of these software have not passed the certification of specialized agencies, and their reliability and security are not It is doubtful that it can be used to process general private data, but it cannot be used to process classified data

[0009] To sum up, when routine operations such as deleting and formatting are used to "destroy" data, in fact the data is not actually destroyed, and the data will remain until new data is written into the same storage space of the hard disk, so there is a possibility that it will be destroyed by others. risk of deliberate recovery

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