Cloud data multi-copy integrity verification and correlation deletion method and cloud storage system

Abstract

The invention belongs to the technical field of cloud data security with a protocol as a feature, and discloses a cloud data multi-copy integrity verification and correlation deletion method and a cloud storage system. The method comprises the following steps that a user randomly generates a data key to encrypt a file copy, and meanwhile, the user encrypts a data key by using a control key issuedby a trusted third party, the key and a file ciphertext are outsourced to the cloud on the premise of guaranteeing safety; and the user creates a cloud file multi-copy association table, and utilizesa Merkle hash verification tree and a cloud data integrity verification and correlation deletion strategy combined with a user pre-designated random deletion sequence. According to the method and thesystem, the management expenditure of the user on a large number of file keys in a traditional encryption scheme is eliminated, the use convenience degree of the user about cloud ciphertext data is improved, a problem of safe backup of user outsourcing data is solved, and the integrity verification and association deletion requirements of the cloud multi-copy data by the user are met.

Description

technical field [0001] The invention belongs to the technical field of cloud data security characterized by protocols, and in particular relates to a method for verifying the integrity of multiple copies of cloud data and associated deletion, and a cloud storage system. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: With the rapid development of network information technology, technical services represented by big data and cloud computing are increasingly favored by individual and enterprise users, and more and more users store personal and enterprise data in the cloud. Driven by the dual drive of user needs and enterprise service provision, cloud storage technology has received extensive attention in both academia and industry. However, while cloud storage brings convenience to users, there are also the following problems and challenges: 1) Cloud plaintext storage security issues. Cloud storage separates d...

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Problems solved by technology

[0003] In summary, the problems in the prior art are: At present, the data deletion technology in the cloud environment is still under research. The problem with the existing technology is that in the complete life cycle of cloud data, there are almost no solutions to simultaneously solve the problem of secure storage of data and integrity verification of multi-copy data in the cloud. and the question of verifiable data deletion

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