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Picture file encryption and decryption method and system based on content-associated secret key

An associated key, encryption and decryption technology, which is applied in the image file encryption method and system field based on the content associated key, can solve problems such as the inability to ensure user data privacy, and achieve the effect of increasing system costs and strong anti-brute force cracking capabilities

Inactive Publication Date: 2016-07-06
WUHAN YOUXIN ZHONGWANG TECH CO LTD
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AI Technical Summary

Problems solved by technology

Therefore, cloud storage systems using traditional encryption technology cannot actually ensure user data privacy, which is a major problem in data security in current cloud storage systems

Method used

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  • Picture file encryption and decryption method and system based on content-associated secret key
  • Picture file encryption and decryption method and system based on content-associated secret key
  • Picture file encryption and decryption method and system based on content-associated secret key

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Embodiment Construction

[0048] The technical solutions of the present invention will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

[0049] The invention proposes a picture file encryption technology based on a content-associated key. At present, network bandwidth is developing rapidly, and ordinary users can generally obtain more than 2M bandwidth. Therefore, the present invention conceives by cutting the picture file into two parts: sensitive data and main body data. Among them, sensitive data is a relatively small part, ranging from 0.1% to 10% of the total data volume, and the main data accounts for more than 90% of the total data volume. Among them, the main data is encrypted and distributed through the ordinary network, and the sensitive data is transmitted as a key through a high-security network, such as data drives and ports that are specially strengthened and encrypted. The goal of segmentation is to transmit data with t...

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Abstract

The invention relates to a picture file encryption and decryption method and a picture file encryption and decryption system based on a content-associated secret key. When in encryption, according to the importance of data with respect to file application, the original picture file is segmented into sensitive data and main body data, the sensitive data forms a secret key, the main body data is subjected to supplemental treatment to form a cryptograph, and the secrete key and the cryptograph are respectively transmitted via different ways, and then combined at a destination to revert to the original picture file when in decryption; when the original picture file is segmented, the segmentation operation of the picture file is performed in a file layer, and the segmentation operation is performed in pixels based on a pixel gray level value or the contour line of a monochromatic chromatic value. According to the new encryption mechanism based on the content-associated secret key provided by the invention, the secret key with large data volume can be used, and the encryption and decryption processes are basically performed on the client, thus the system load is not increased; the new encryption mechanism can improve the data safety of the cloud storage system, in particular enhancing the privacy of the user data.

Description

technical field [0001] The invention relates to the technical field of image file encryption, in particular to a method and system for encrypting image files based on a content-associated key. Background technique [0002] The cloud computing environment is relatively complex. In order to ensure an effective security mechanism, cloud service providers mainly use ciphertext access control technology to eliminate users' concerns about information security in untrusted scenarios. The basic idea is to encrypt the file with a key, and the user uses the ciphertext access control technology and encrypted retrieval technology to access the data. At present, on the basis of encryption based on block ciphers, encryption based on attributes, digital signatures, and integrity checks, cloud storage data security solutions such as encryption for data storage and data transmission, and ciphertext access control technologies have basically been formed. [0003] 1. Basic data encryption ...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L29/08
CPCH04L63/0428H04L63/06H04L67/06
Inventor 张凯
Owner WUHAN YOUXIN ZHONGWANG TECH CO LTD
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