Fully homomorphic block chain privacy protection method based on Shamir threshold secret sharing

Abstract

The invention relates to the technical field of Internet privacy protection, in particular to a fully homomorphic block chain privacy protection method based on Shamir threshold secret sharing, and the method specifically comprises the steps: taking participants in a transaction as nodes to construct corresponding physical chains, and constructing logic chains corresponding to the physical chains at the same time; the balance information of the nodes is divided into corresponding balance secret shares based on secret sharing of a Shamir threshold, and the balance secret shares are stored in physical chains of the corresponding nodes; the payment party and the revenue direction of the transaction are used as other nodes of participants to publish transaction amount secret shares about the transaction amount; and each participant verifies whether the transaction amounts published by the payer and the income party are equal and whether the balance of the payer is greater than the transaction amounts based on the transaction amount secret share, and judges whether the transaction is legal according to the verification result of each participant. According to the method, the availability of the block chain and the confidentiality of privacy information can be considered, so that the effectiveness and privacy of transactions can be improved.

Description

technical field [0001] The invention relates to the technical field of Internet privacy protection, in particular to a fully homomorphic blockchain privacy protection method based on Shamir threshold secret sharing. Background technique [0002] With the rise of Bitcoin technology, blockchain, as the core technology of the underlying support, has attracted widespread attention in the industry. A blockchain is a shared, distributed database that records transactions between various participants. Due to the advantages of blockchain technology such as decentralization, trustworthiness, transparency, security and efficiency, more and more fields have begun to explore the application of blockchain and seek effective solutions. As blockchain technology gradually becomes an important strategy for distributed storage, its application model will also expand rapidly, and the provision of storage services and access services will also be refined. It is foreseeable that more and more ...

AI Technical Summary

Problems solved by technology

However, this contradicts the basic principles of the blockchain to a certain extent, because the blockchain is a distributed database whose blocks must be generally approved and maintained, and it is difficult for existing schemes to satisfy the verifiability of ciphertexts at the same time. and computability, especially when the ciphertext is encrypted by different keys, making it difficult to balance the usability of the blockchain and the confidentiality of private information

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