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Cloud sharing data integrity auditing method capable of tracking user identities

A technology of data integrity and user identity, applied in the field of information security, can solve the problems of high communication and computing overhead, re-signature, etc.

Active Publication Date: 2019-07-23
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical applications, we may need to track the source of the data block, and at the same time need to ensure that the user's identity privacy is not obtained by others. Li et al. proposed a shared data integrity audit scheme that can track the data source, but in this In the scheme, when a user in the group revokes, the rest of the users need to re-sign all the data blocks, and the communication and calculation overhead is relatively large

Method used

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  • Cloud sharing data integrity auditing method capable of tracking user identities
  • Cloud sharing data integrity auditing method capable of tracking user identities
  • Cloud sharing data integrity auditing method capable of tracking user identities

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Embodiment Construction

[0063] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments. The embodiments described in the present invention are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, other embodiments obtained by persons of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0064] like figure 1 As shown, the system framework involved in the present invention consists of four entities: group users, group administrators, cloud servers, and trusted third-party auditors TPA. The group contains multiple users, group members can join or leave the user group, and group users share data through cloud storage; the group administrator is responsible for the joining and revocation of group users, and revoked users cannot upload or access Cloud data; cloud servers provide a large a...

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Abstract

The invention discloses a cloud sharing data integrity auditing method capable of tracking user identity, which belongs to the field of information security and comprises the following steps of: generating a secret key, adding a user, generating an authenticator, generating a proof, verifying the proof, tracking the identity, and revoking the user. According to the invention, the authenticator corresponding to the data block is generated based on the group signature algorithm, so that a group administrator can track the source of the data block when necessary, the identity privacy of the useris ensured not to be leaked to others, and the joining and canceling of the group user can be well supported. The method is suitable for the situation that cloud shared data is disputed or a malicioususer uploads wrong data, and a data source is needed to be tracked in a group environment.

Description

technical field [0001] The invention belongs to the field of information security, and in particular relates to a cloud shared data integrity audit method that can track user identity. Background technique [0002] Data sharing is a widely used form of cloud storage. Through the cloud data sharing service, users can share their own data within a group. Specifically, in a work group, after a user uploads his data to the cloud, other users in the group can Accessing and modifying this data not only enables information sharing but also reduces the burden of local data storage on users. Although cloud service providers promise to provide users with a safe and reliable environment, data may be lost or damaged due to software and hardware failures or human factors. At the same time, cloud service providers may pay to avoid damage to their reputation or economic losses. The user conceals the situation, and may even delete the data that the user does not use frequently in order to...

Claims

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Application Information

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IPC IPC(8): H04L9/08H04L29/06G06F21/46G06F21/64
CPCG06F21/46G06F21/64H04L9/0819H04L9/0861H04L9/0891H04L63/0876H04L63/123
Inventor 张茜王箭
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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