User privacy data security providing method based on blockchain

Abstract

The invention discloses a user privacy data security providing method based on a blockchain. The method comprises the following steps: configuring a data service node and a privacy data blockchain node on the blockchain; when the private data is queried, sending a target data query request and a public key PK6 in a demand side transaction key pair to the data service node; performing security verification on a target data query request sent by a data demander; obtaining a target ciphertext C2 and sending the target ciphertext C2 to a data service node; decrypting the target ciphertext C2 through an asymmetric private key SK2 of the data holder; encrypting the target plaintext M through a public key PK6 to obtain a target ciphertext C3, and signing the target ciphertext C3 through a private key SK3; authenticating the signature through a public key PK3 of the external communication key pair, and decrypting the authenticated target ciphertext C3 through a private key SK6 to obtain a target plaintext M. According to the invention, the security level of data transmission and storage of a user in a specified industry is improved.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to a block chain-based method for safely providing user privacy data. Background technique [0002] Blockchain is a new application model of computer technology such as decentralized, open and transparent distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithm. It has the characteristics of being unforgeable, leaving traces throughout the process, traceable, open and transparent, and collectively maintained. At present, in real usage scenarios, various platforms, enterprise data, and businesses contain a large amount of confidential information. This information needs to be properly hidden to protect privacy, and at the same time, it needs to take into account the related requirements of computing, capacity, verification, and supervision. [0003] In the existing technology, there are two ways of data encryption,...

AI Technical Summary

Problems solved by technology

However, due to the openness, transparency and collective maintenance of the blockchain, it is easy to leak the private data of job seekers and recruiting companies, and be stolen and used by various headhunting companies

Similarly, after the introduction of blockchain in the real estate industry, the personal privacy data of house sellers and the personal privacy data of house buyers are leaked.

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