File encryption method, device and equipment
A technology of file encryption and encryption method, which is applied in the field of data security, can solve the problems that encryption methods are easy to be cracked and reduce file security, so as to increase the difficulty of cracking and improve security
Inactive Publication Date: 2016-08-24
BEIJING KINGSOFT INTERNET SECURITY SOFTWARE CO LTD
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[0003] Usually, traditional encryption algorithms can be used for data encryption, such as Advanced Encryption Standard (AES) or Data Encryption Standard (Data Encryption Standard, DES), etc. However, this encryption method is easier to be cracked, thus reducing file size security
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[0061] The embodiment of the present invention provides a file encryption method, device and equipment, which can improve the security of files.
[0062] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0063] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but ...
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The embodiment of the invention provides a file encryption method, device and equipment. The method comprises the steps that the memory size of a file to be encrypted is obtained; when the memory size is larger than a preset threshold value, the file to be encrypted is divided into N small blocks, wherein N is an integer larger than 1; M of N small blocks are encrypted in a first encryption mode, and other small blocks except the M small blocks are encrypted in a second encryption mode, wherein M is a positive integer smaller than N. According to the file encryption method, device and equipment, one part of the file to be encrypted can be encrypted in the first encryption mode, and the other part of the file to be encrypted can be encrypted in the second encryption mode. Accordingly, two encryption modes are adopted for encrypting the file, the decryption difficulty of the file to be encrypted is increased, and therefore safety is improved.
Description
technical field [0001] The invention relates to the technical field of data security, in particular to a file encryption method, device and equipment. Background technique [0002] With the rapid development of information technology, terminals (such as mobile phones, tablet computers, etc.) are used more and more frequently. In today's era, more and more information is stored in computers, and data security is becoming more and more important. Therefore, when stored in various devices and used in services, data must be properly encrypted, for example, when storing data in the cloud, this encryption is even more necessary, because data stored in the cloud is always subject to malicious attacks from time to time possible. [0003] Usually, traditional encryption algorithms can be used for data encryption, such as Advanced Encryption Standard (AES) or Data Encryption Standard (Data Encryption Standard, DES), etc. However, this encryption method is easier to be cracked, thus ...
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IPC IPC(8): G06F21/60
CPCG06F21/60G06F21/602G06F2221/2107
Inventor 胡镇杰
Owner BEIJING KINGSOFT INTERNET SECURITY SOFTWARE CO LTD