Data encoding method and system supporting data ownership certification and data restoration

Abstract

The invention discloses a data encoding method supporting data ownership certification and data restoration and belongs to the field of information security. The method comprises the following steps:after a client fragments a file, a coding fragment and a verification label thereof are generated according to a redundancy strategy R, a trap door random function T and a data ownership proving scheme S, the coding fragment and the verification label are sent to a storage node, and a corresponding relationship is sent between a coding fragment index and the storage node to an auditing node; the private parameters are stored locally at the client, and the public parameters are sent to the storage node and the auditing node; after randomly selecting the challenge node and the challenge set, theauditing node initiates a challenge, so that the challenge node obtains the corresponding coding fragment and the verification label thereof, generates a data ownership certificate according to the Sand returns the data ownership certificate; if the auditing node receives the data ownership proof in the challenge time window and passes the verification, the challenge succeeds; otherwise, challenge failure. According to the invention, the integrity and reliability of the data can be ensured in the distributed storage system.

Description

technical field [0001] The invention belongs to the field of information security, and more specifically relates to a data encoding method and system supporting data possession proof and data restoration. Background technique [0002] Due to cost and security considerations, more and more enterprises and individuals store data on the cloud. In addition, with the development of blockchain technology, many people propose to use blockchain technology to establish a decentralized storage network, making full use of Edge storage devices reduce costs. However, in distributed storage scenarios such as cloud storage and blockchain storage, there may be problems of storage parties doing evil and data loss. On this basis, data possession proof schemes and data redundancy storage schemes have emerged respectively. [0003] Proof of data possession can prevent the storage party from doing evil to a certain extent. Through the proof of data possession, users can ensure the integrity of ...

AI Technical Summary

Problems solved by technology

It can be seen from this that if data restoration on the storage side is supported while supporting data possession proof, it is equivalent to leaving the possibility for the storage side to do evil. Therefore, the existing data possession proof method cannot support data restoration. , it is impossible to guarantee the integrity and reliability of data in the distributed storage system at the same time

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