Verifiable deletion method and system supporting efficient update of outsourcing data

Abstract

The invention belongs to the technical field of data processing, and discloses a verifiable deletion method and system supporting efficient update of outsourcing data, and the method comprises the steps that a data owner encrypts a file to protect sensitive information in the file, and outsources a ciphertext to a cloud server; the cloud server maintains the received data and returns a storage evidence, and the storage evidence is used for verifying a storage result; the data owner sends an updating request to the cloud server, and the cloud server updates the data according to the updating request and returns updating evidences; the data owner can verify whether the data is correctly updated or not; if the data is not needed any more, the data owner sends a data deleting command to the cloud server to delete the data; the cloud server executes deletion operation and returns deletion evidences; and the data owner can verify the deletion result according to the returned deletion evidence. Verifiable data storage and deletion and efficient data updating can be realized at the same time, and public verifiability can be realized without any trusted third party.

Description

technical field [0001] The invention belongs to the technical field of data processing, and in particular relates to a verifiable deletion method and system supporting efficient update of outsourced data. Background technique [0002] At present, with the rapid development of information technology, the amount of data is also increasing. According to the Internet Data Center (IDC), the total amount of data worldwide is expected to increase from 4.4 zeta bytes in 2013 to 44 zeta bytes by the end of 2020. In other words, by 2020, the amount of data per person will exceed 5,000 GB (about 5,200 GB). However, data owners have very limited storage and computing capabilities. Therefore, how to effectively store and manage such large-scale data becomes a very challenging problem. Fortunately, cloud storage provides a viable solution to the problem of large-scale data storage. Cloud storage is one of the most attractive services provided by cloud service providers, which can prov...

AI Technical Summary

Problems solved by technology

[0014] (1) To achieve verifiable deletion of outsourced data in existing technologies, it is necessary to introduce a trusted third party for key management or / and verification of deletion results, which seriously hinders the development of outsourced data deletion systems

[0015] (2) Existing technologies cannot realize secure deletion and efficient update of outsourced data at the same time

[0016] The difficulty of solving the above problems and defects is: in the business model, the cloud server is dishonest and selfish

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