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Device file encryption and decryption method and device

A device file and encryption device technology, applied in the computer field, can solve the problem that the encryption and decryption methods do not take into account security and processing speed at the same time

Active Publication Date: 2014-12-10
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, the prior art encryption and decryption methods for large files in device software do not take into account both security and processing speed

Method used

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  • Device file encryption and decryption method and device
  • Device file encryption and decryption method and device
  • Device file encryption and decryption method and device

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Embodiment Construction

[0111] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.

[0112] In the prior art, when encrypting and decrypting files in the device software, a strong encryption algorithm or a weak encryption algorithm can be selected, wherein the security of the strong encryption algorithm is higher than that of the weak encryption algorithm. The files in the device software are called device files. Generally, the co...

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Abstract

The embodiment of the present invention provides a device file encryption and decryption method and device. The device file encryption and decryption method comprises dividing a device file into a first portion and a second portion, the first portion and the second portion individually comprising at least one file block; encrypting the first portion and the second portion individually, the encryption algorithm corresponding to the file block in the first portion being a first encryption algorithm while the encryption algorithm corresponding to the file block in the second portion being a second encryption algorithm, and the first encryption algorithm being different from the second encryption algorithm; and storing the encrypted device file. With adoption of the device file encryption and decryption method and device provided by the utility model, the device file can be encrypted, and security and processing speed are also considered.

Description

technical field [0001] The embodiments of the present invention relate to the field of computer technology, and in particular to a method and device for encrypting and decrypting device files. Background technique [0002] At present, various communication, electronic, and mechanical manufacturing equipment generally use software to control various functions of the equipment, and the software that implements various functions in the equipment is collectively referred to as equipment software. As a part of the device, the device software is part of the intellectual property rights of the device manufacturer. In order to ensure that the device software is not cracked and leaked by means of disassembly, and at the same time increase the complexity of the device software being tampered with, the device software needs to be encrypted and stored. only when decrypted. [0003] Generally, the software package file of the device software is relatively large, and the system overhead ...

Claims

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Application Information

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IPC IPC(8): G06F21/60H04L9/06
CPCG06F21/6218H04L9/14G06F2221/2107G06F21/00G06F21/10
Inventor 宋卓
Owner HUAWEI TECH CO LTD
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