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Revocable attribute-based encryption system and method for cloud storage

An attribute-based encryption and encryption system technology, which is applied in the field of cloud storage-oriented reversible attribute-based encryption system, can solve the problem that the CP-ABE scheme is difficult to meet user needs, achieve fine-grained access control capabilities, improve efficiency, and Effect of undo ability

Active Publication Date: 2018-06-22
PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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Problems solved by technology

[0005] However, in the existing research, it is found that the current CP-ABE scheme has many advantages such as fine-grained access control in the data outsourcing environment, resistance to collusion attacks between revoked users and non-revoked users, saving computing and storage resources, and maintaining attribute revocation lists. There are certain defects in all aspects, making it difficult for the existing CP-ABE scheme to meet the needs of users

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  • Revocable attribute-based encryption system and method for cloud storage

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Embodiment Construction

[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0059] The terms "first" and "second" in the specification and claims of the present invention and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or apparatus comprising a series of steps or units is not defined by listed steps or u...

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Abstract

The invention discloses a revocable attribute-based encryption system and method for cloud storage. An attribute authorization module generates a public key and a main private key of an encryption system, and an attribute private key and an attribute group initial key of a data user; a data owner module constructs a data access structure, and obtain initial ciphertext by encrypting the plaintext;a data management module generates a attribute group key through the constructed key encryption key tree, performs re-encryption processing on the initial ciphertext to generate a ciphertext file anda ciphertext header of the ciphertext file, and stores the ciphertext file via a storage module; the data management module can also update the attribute group key after the data user module attributeis revoked, and process to obtain an updated ciphertext file. The data user module accesses the ciphertext file and decrypts the ciphertext file to obtain a plaintext corresponding to the ciphertextfile. Therefore, the attribute-level user revocation capability is implemented, the collusion attack between a revoking user and a non-revoking user can be resisted, and fixed-length ciphertext lengthand higher efficiency are achieved.

Description

technical field [0001] The invention relates to the technical field of data security, in particular to a reversible attribute-based encryption system and method for cloud storage. Background technique [0002] In recent years, with the rapid development and wide application of technologies such as big data and cloud computing, massive data generated by a large number of users will be uploaded to cloud servers for storage or calculation, so data-related security issues have become a research hotspot. [0003] Attribute-Based Encryption (ABE), as a new type of public key encryption system, can realize flexible and fine-grained access control to data according to user attributes, and is one of the key supporting technologies to solve the current cloud storage security problems. According to the embedding position of the access structure, ABE is divided into key policy attribute encryption scheme (Key-Policy ABE, KP-ABE) and ciphertext policy attribute encryption scheme (Ciphert...

Claims

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Application Information

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IPC IPC(8): H04L29/08H04L29/06H04L9/14H04L9/08
CPCH04L9/0863H04L9/0891H04L9/14H04L63/0428H04L67/1097
Inventor 孙磊窦睿彧赵志远李作辉胡翠云郭松辉户家富赵琨毛秀青郭松
Owner PLA STRATEGIC SUPPORT FORCE INFORMATION ENG UNIV PLA SSF IEU
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