Method and device for dynamic deployment and evolution of smart contracts based on blockchain

Abstract

The present invention discloses a block chain-based smart contract dynamic deployment and evolution method and device, wherein the method includes: initializing a plurality of attribute authorization centers, generating a public-private key pair of the attribute domain of each attribute authorization center and The property key is encrypted and distributed to the corresponding entity through the public-private key pair; the smart contract is formulated for the entity through the smart contract customization platform; the smart contract is preprocessed through the chameleon hash function, and Deploy the preprocessing results in the blockchain. Through the modularization of smart contracts, this method realizes the dynamic combination and customization of smart contracts, improves the writing efficiency of smart contracts, and uses cryptographic schemes such as chameleon hashing and multi-authorization center ciphertext policy attribute-based encryption to realize The evolution of smart contracts in legal scenarios can avoid economic losses caused by programming errors in smart contracts or use defects caused by imperfect predefined functions.

Description

technical field [0001] The present invention relates to the technical field of block chain application, in particular to a method and device for dynamic deployment and evolution of smart contracts based on block chain. Background technique [0002] Blockchain technology was born in the Bitcoin system proposed by Satoshi Nakamoto. Its essence is a decentralized database, which has the advantages of decentralization, non-tampering, openness and transparency. Smart contract is a concept proposed by Szabo in 1997. In the blockchain scenario, a smart contract is an executable computer program with a logical sequence running on the blockchain database, which can satisfy the predefined requirements in its source code. self-execute when condition. Due to the feature that smart contracts can be automatically executed without a trusted third party, it reduces the cost of trust among multiple contract participants who do not trust each other. [0003] However, due to the immutable na...

AI Technical Summary

Problems solved by technology

However, due to the non-tamperable modification of the data on the blockchain and the content of the smart contract, it is quite difficult to upgrade and update the smart contract in most current blockchain systems. Therefore, there are still some obstacles that cannot be ignored in the application process. and defects

If there are logical loopholes or imperfect designs in the smart contract, the non-tamperable modification of the blockchain will not be conducive to the timely update and stop loss of the smart contract

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