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Hierarchical access control system and method for supporting data sharing in cloud storage

A data sharing and access control technology, applied in the transmission system, electrical components, etc., can solve the problems that users cannot share ciphertext data, and it is not suitable for cloud storage data security sharing scenarios, etc.

Active Publication Date: 2018-06-01
XIDIAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In summary, the problems in the prior art are: In the hierarchical access control method based on the symmetric cryptosystem, the user usually cannot share the decryptable ciphertext data with any other user, which is not suitable for cloud storage data security sharing scenarios

Method used

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  • Hierarchical access control system and method for supporting data sharing in cloud storage

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Embodiment Construction

[0046] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0047] The present invention realizes hierarchical access control under the public key cryptosystem based on the key aggregation method, and only needs to distribute a single key with a fixed length to the user to realize the decryption of the data of the user group in which the user belongs and subordinate user groups.

[0048] Such as figure 1 As shown, the layered access control method supporting data sharing in the cloud storage provided by the embodiment of the present invention includes the following steps:

[0049] S101: System initialization: the trusted authorization center generates system secret information and...

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Abstract

The invention belongs to the technical field of protection of data access through a platform, and discloses a hierarchical access control system and method for supporting data sharing in cloud storage. The hierarchical access control method for supporting data sharing in cloud storage comprises: a trusted authorization centre generates system secret information and public information, and opens the system public information to users; according to a user group grade structure, the trusted authorization centre generates the secret key of each user group based on a secret key aggregation method,and distributes secret keys to all the corresponding users; the users encrypt data to be shared by utilizing the system public information of any target user group, and upload and store the data in acloud server; valid users obtain ciphertext data stored in the cloud server, and decrypt the data by utilizing a user group secret key; and, when the access permission of a certain user needs to be repealed, the trusted authorization centre and the cloud server perform a system updating and re-encrypting process. According to the hierarchical access control system and method for supporting data sharing in cloud storage disclosed by the invention, oriented towards a cloud storage environment, hierarchical access control supporting flexible data security sharing and without a secret key deduction process in a public key cryptography system can be realized.

Description

technical field [0001] The invention belongs to the technical field of protecting data access through a platform, and in particular relates to a layered access control system and method supporting data sharing in cloud storage. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: Cloud computing is a new computing model based on dynamically scalable virtualization technology, which uses computing as a resource and provides on-demand computing services to users with limited resources through the Internet. With the explosive growth of data volume in cyberspace, the problem of data storage becomes more and more difficult. As an extension of cloud computing technology, cloud storage service provides outsourced storage solutions for data. Cloud service providers use cloud storage servers to provide users with data storage resources and related management services. Users purchase storage services by paying a certain f...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L29/08
CPCH04L63/101H04L67/1097
Inventor 陈晓峰邱震尧张志为陶晓玲王勇
Owner XIDIAN UNIV
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