Certificateless cloud storage data integrity public auditing method

A data integrity, cloud storage technology, applied in the field of information security, can solve problems such as lag

Active Publication Date: 2021-09-07
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Severe lags may be unacceptable as audit requests may be concentrated during a specific time period

Method used

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  • Certificateless cloud storage data integrity public auditing method
  • Certificateless cloud storage data integrity public auditing method
  • Certificateless cloud storage data integrity public auditing method

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Embodiment Construction

[0049] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.

[0050] refer to figure 1 , this embodiment provides a certificate-free public audit method for cloud storage data integrity, including:

[0051] S1. System initialization: the key generation center sets password security parameters, and the password security parameters include bilinear pair mapping, multiplicative cyclic group, generator defined on the multiplication cyclic group; the key generation center sets two anti-collision Hash function and a homomorphic hash function, and select the system master private key and system ma...

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Abstract

The invention discloses a certificateless cloud storage data integrity public auditing method. The method comprises the following steps: S1, a system is initialized; S2, the user blocks and encrypts the data file to obtain ciphertext data blocks, homomorphic signatures of the ciphertext data blocks are generated, and a signature set is formed; the user generates integrity auditing auxiliary information, sends the ciphertext data block and the signature set to the cloud server, and sends the integrity auditing auxiliary information to a third-party auditor; S3, the third-party auditor generates challenge information, sends the challenge information to the cloud server, and generates a pre-calculation value; S4, the cloud server generates auditing proof response information and returns the auditing proof response information to the third-party auditor; and S5, the third-party auditor verifies the correctness of the auditing proof response information by using the pre-calculation value, the system public parameters, the verification public key of the user and the anonymous identity. The method is designed based on a certificateless cryptosystem, and key escrow and complex certificate management can be effectively avoided.

Description

technical field [0001] The invention belongs to the technical field of information security, in particular to a certificate-free public audit method for cloud storage data integrity. Background technique [0002] In the era of big data, data is the most valuable resource. Big data can help us analyze problems, discover the laws of the development of things, and use these laws to solve practical problems. However, if we want to make better use of data, we first need to obtain as much data information as possible, and the second is to effectively process the data. Due to the wide range of data sources, various types and huge quantities, data acquisition requires a lot of storage devices to store data and sufficient computing power for data processing. Although the terminal equipment is constantly being updated and its performance has been greatly improved, the storage capacity and computing power of the terminal equipment cannot meet the needs of massive data storage and pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/32H04L9/30H04L29/08G06F21/62G06F21/60
CPCH04L9/3271H04L9/3247H04L9/3236H04L9/3073H04L67/1097G06F21/602G06F21/6245H04L2209/42
Inventor 张晓均王鑫唐伟王文琛薛婧婷刘庆
Owner SOUTHWEST PETROLEUM UNIV
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