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File encryption method, file decryption method, file encryption device and equipment

An encryption method and file technology, applied in the field of information security, can solve problems such as low encryption efficiency, and achieve the effect of increasing decryption difficulty, flexible decryption method, and improving experience.

Inactive Publication Date: 2017-02-01
BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using this encryption method to encrypt large files, the encryption efficiency is low

Method used

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  • File encryption method, file decryption method, file encryption device and equipment
  • File encryption method, file decryption method, file encryption device and equipment
  • File encryption method, file decryption method, file encryption device and equipment

Examples

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Embodiment Construction

[0142] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.

[0143] figure 1 is a flow chart of a file encryption method shown according to an exemplary embodiment, such as figure 1 As shown, the file encryption method involved in this embodiment is used in a terminal device, which is a device capable of storing files such as pictures and videos, such as a mobile phone, a personal digital assistant (Personal Digital Assistant, PDA for short), a computer ...

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Abstract

The invention discloses a file encryption method, a file decryption method, a file encryption device and equipment. The method comprises the following steps: obtaining a to-be-encrypted file; generating a secrete key, an offset value and a sampling value; determining the to-be-encrypted field in the to-be-encrypted file according to the offset value and the sampling value; and encrypting the to-be-encrypted field according to the secrete key. According to the invention, the file encryption efficiency can be improved.

Description

technical field [0001] The present disclosure relates to the technical field of information security, and in particular to a file encryption method, decryption method, device and equipment. Background technique [0002] With the development and popularization of terminal equipment, people pay more and more attention to the security of information generated on terminal equipment, such as pictures and videos. Therefore, how to effectively encrypt and decrypt these files is becoming more and more important . [0003] In related technologies, when encrypting files such as pictures or videos, encryption algorithms, such as Data Encryption Standard (Data Encryption Standard; DES for short), and Message-Digest Algorithm 5 (abbreviation: MD5), etc. are used to encrypt files. encryption. When this encryption method is used to encrypt large files, the encryption efficiency is low. Contents of the invention [0004] In order to overcome the problems existing in related technologie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/60G06F21/62G06F21/64
CPCG06F21/602G06F21/6209G06F21/64G06F2221/2107
Inventor 卡涛李明浩曲雯雯
Owner BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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