File protection method and device

A file and file name technology, applied in the computer field, can solve the problems of file corruption, undetectable virus, non-existence, etc.
CN107871089AActive Publication Date: 2018-04-03HANGZHOU ANHENG INFORMATION TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
HANGZHOU ANHENG INFORMATION TECH CO LTD
Publication Date
2018-04-03

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Abstract

The invention provides a file protection method and device, and relates to the technical field of computers. The file protection method comprises the following steps of: when a first access instruction for a first file in a first preset file type is obtained, judging whether an access manner corresponding to the first access instruction is a first access manner or not; when the judging result is positive, carrying out a preset virtualization operation on a first copy file of the first file on the basis of the firs access instruction so as to obtain a second file; judging whether a similarity between the first file and the second file is greater than a preset threshold value or not; and when the similarity is greater than the preset threshold value, replacing the first file by the second file. Aiming at the manner of attacking files by ransomware, the file protection method is capable of defensing behaviors and features of the ransomware in an active manner, so as to prevent the ransomware from attacking the files in an encryption form and the like, and avoid the loss caused by virus attack.
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Description

technical field

[0001] The present invention relates to the field of computer technology, in particular to a file protection method and device. Background technique

[0002] In the prior art, the main means of defense against ransomware is traditional anti-virus software to detect and kill, but traditional anti-virus software has missed killing viruses, for example, some virus characteristics do not exist in anti-virus software, resulting in failure to detect these viruses. Therefore, the passive way of protecting files by using antivirus software may cause viruses to damage files and bring losses to users. Contents of the invention

[0003] In view of this, an embodiment of the present invention provides a file protection method and device to solve the above problems.

[0004] In order to achieve the above object, the technical scheme adopted in the present invention is as follows:

[0005] A file protection method, when obtaining a first access command for a first fil...

Claims

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