Multiparty data sharing method and system for protecting privacy data sending source

Abstract

The invention discloses a multiparty data sharing method for protecting privacy of a data sending source. A plurality of participants are jointly connected with a block chain and share data. The method comprises the steps that S1, the participants generate public and private key pairs; S2, the participants publish public keys corresponding to own identities and record all published public keys; S3, the data sending source generates a ring signature based on all public keys, a private key of the data sending source and to-be-sent data and writes the data and the ring signature into a block chain through a one-time private key; and S4, other participants reads the data and the ring signature, verify the ring signature based on the public keys, the data and the ring signature, employ the data if the verification result indicates legality, and do not employ the data if the verification result indicates illegality. The invention also discloses a corresponding system. According to the method and the system, the identity privacy data of a data sharer is prevented from being exposed, and data receivers believe that the data sharer really has the data sharing authority or even realizes responsibility investigation.

Description

technical field [0001] The invention relates to the technical field of data sharing, in particular to a multi-party data sharing method and system for protecting the privacy of data sending sources. Background technique [0002] In a broad sense, blockchain refers to a brand new distribution that uses block chain data structures to verify and store data, uses distributed node consensus algorithms to generate and update data, and uses cryptography to ensure the security of data transmission and access. infrastructure and computing paradigms. Blockchain technology collectively maintains a reliable database in a decentralized and trustless manner to solve the trust and security issues of transactions. [0003] Blockchain technology is not a single technology, but the result of the integration of multiple technologies. These technologies are combined in a new structure to form a new way of data recording, storage and expression, mainly involving the following four technology: ...

AI Technical Summary

Problems solved by technology

In some cases, when the sender shares data with his own identity exposed, for the sake of minimal loss of privacy, he often uses desensitization to reduce the privacy content contained in the data, but at the same time, the value of the data also dropped significantly

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