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A digital watermarking method and system supporting cloud data deduplication

A digital watermarking and watermarking technology, applied in the field of cryptography and image processing, can solve the problems of increasing the difficulty of data deduplication, waste of storage space and resources, and reducing the quality of cloud storage services, so as to achieve the goal of improving utilization and taking quality into account Effect

Active Publication Date: 2021-08-06
INST OF INFORMATION ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The processing of data obviously increases the difficulty of data deduplication, and the resulting waste of storage space and resources will reduce the service quality of cloud storage to a certain extent
This conflict is currently not receiving enough attention and being well resolved

Method used

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  • A digital watermarking method and system supporting cloud data deduplication
  • A digital watermarking method and system supporting cloud data deduplication
  • A digital watermarking method and system supporting cloud data deduplication

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Embodiment Construction

[0060] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0061] Parameter Description:

[0062] G 1 It is necessary to generate a large prime multiplication commutative group when the system is initialized, g and g m Both represent generators of the group;

[0063] K CE It is a series of bit strings (keys) derived by the CE algorithm, used to specify the digital watermark embedding position;

[0064] I wm It is a string of random bits generated by the first file uploader, which is the content of the digital watermark;

[0065] Represents the multiplication of ordinary numbers;

[0066] + and Represents a bitwise addition operation;

[0067] || indicates information splicing;

[0068] e(·,·) represents a pair calculation on a bilinear map;

[0069] H(·) represents the cryptographic hash function sel...

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Abstract

The invention relates to a digital watermarking method and system supporting cloud data deduplication. The method includes: the user terminal submits a request to the cloud server for uploading an original file; if the original file is uploaded for the first time, the user terminal uses a digital watermark to generate a watermark file for the original file, and generates the original file according to the watermark embedding position and watermark content of the digital watermark. For the ownership certificate of the file, upload the ownership certificate and the watermark file to the cloud server; if the original file is not uploaded for the first time, the user end uses the watermark information to prove the ownership of the original file, and if it has ownership, the cloud server will include the user end. owner list, otherwise refuse to add the client to the owner list. Further, file distribution and file restoration can be realized. The digital watermark preferably uses a frequency-domain digital watermark. The present invention can take into account the quality of cloud storage service under the premise of protecting user ownership, and greatly improve the utilization rate of cloud storage space.

Description

technical field [0001] The invention relates to the fields of encryption and image processing, in particular to a digital watermarking method and system supporting data deduplication in a cloud storage environment. Background technique [0002] Efficient and low-cost cloud storage services have been widely used as an important part of cloud computing, especially with the rapid development of social media in recent years, the explosive growth of data volume has driven data storage from traditional complicated and expensive local storage management to Cloud storage transfer. A large number of resource files, including multimedia files, can be easily publicized and distributed through cloud storage and cloud computing services. How to continuously maintain the ownership of files to prevent them from being stolen and abused in the process of resource sharing has gradually become a concern of many cloud storage users. Most cloud storage vendors have provided encryption services...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F16/14G06F16/16G06F16/174G06F16/182G06F21/16
CPCG06F21/16G06F16/152G06F16/162G06F16/1748G06F16/182
Inventor 尤玮婧刘丽敏荆继武赵欣怡陈天宇
Owner INST OF INFORMATION ENG CHINESE ACAD OF SCI