Fog collaborative cloud data sharing method based on attribute-based encryption

An attribute-based encryption, cloud data technology, applied in digital transmission systems, key distribution, can solve problems such as high computing and storage costs, inability to achieve personalized and specialized access control, resource consumption, etc.

Active Publication Date: 2019-12-24
已未来(北京)通信科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing data encryption sharing schemes are difficult to achieve effective professional information classification and effective data analysis of shared data, and the encryption process brings serious resource consumption to resource-constrained smart mobile devices
At the same time, user computing and storage costs are still high, and more fine-grained personalized and specialized access control cannot be achieved

Method used

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  • Fog collaborative cloud data sharing method based on attribute-based encryption
  • Fog collaborative cloud data sharing method based on attribute-based encryption
  • Fog collaborative cloud data sharing method based on attribute-based encryption

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Embodiment Construction

[0056] A fog collaborative cloud data sharing method based on attribute-based encryption, specifically comprising the following steps:

[0057] Step 1: System initialization;

[0058] a1: The authority generates the system public key PK and the system master key MSK through the algorithm ACgen(U,λ);

[0059] The authority enters the global attribute U and the safety factor λ into the algorithm ACgen(U,λ), where U={u 1 ,...,u n},λ∈Z q , and choose two cyclic additive groups of order p and and a bilinear map The generator is g, n random group elements Corresponding to the n attributes in U, the public key PK is output through the formula (1); the authority randomly selects the element α∈Z q , output the system master key MSK through formula (2);

[0060] PK=g,g α , e(g,g) α , h 1 ,...,h n (1);

[0061] MSK=g α (2);

[0062] a2: The authority runs the algorithm CSgen according to the formula (3) to generate the private key SK of the cloud service provider and...

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Abstract

The invention discloses a fog collaborative cloud data sharing method based on attribute-based encryption. The method comprises the following steps: 1, initializing a system; the authorization mechanism generates a system public key, a system master key, a private key of the cloud service provider, a public key of the fog node and a private key of the fog node; 2, performing data encryption; the user encrypts the shared data based on the shared content key and then sends the encrypted shared data to the fog node; 3, performing data preprocessing; the fog node receives ciphertext data transmitted from a user, and outputs a preprocessed classification result and indexes of related data information entries; 4, re-encrypting the data; the fog node operates an algorithm, re-encrypts the shareddata based on a professional access strategy, and encrypts related professional entries corresponding to each piece of data; 5, performing data decryption; as long as the attributes of the cloud service provider can meet personalized and professional access policies, the cloud service provider can decrypt the shared ciphertext. According to the method, professional information classification and effective data analysis of the shared data can be conveniently realized.

Description

technical field [0001] The invention relates to a fog collaborative cloud data sharing method based on attribute-based encryption. Background technique [0002] Data sharing is the basis for the rapid development of big data, and data sharing technology requires convenient and reliable platform systems and solutions to deal with the safe storage, management and sharing of data. With the rapid development of cloud computing, some cloud service providers can provide more economical and powerful computing and storage capabilities. Individuals and enterprises are more willing to store and manage data through cloud platforms, and share data with specific user groups. Therefore, the data security sharing technology based on the cloud platform has also been proposed, such as: a new type of medical cloud, users can upload their health information to the cloud platform, and various doctors and users with access rights can share data, and users and doctors can pass " "Medical cloud" ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L9/08H04L29/08
CPCH04L63/0478H04L63/045H04L63/06H04L63/10H04L9/0825H04L9/085H04L9/0861H04L67/10
Inventor 龙浩霍娜
Owner 已未来(北京)通信科技有限公司
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