Editable blockchain system and method based on multi-authorization center attribute encryption

Abstract

The invention discloses an editable block chain system and method based on multi-authorization center attribute encryption, wherein the system includes: an identity verification and attribute key distribution module, which is used to verify whether the identity of each node meets the preset conditions, And distribute the attribute key for the user entity; the transaction preprocessing module is used to preprocess the transaction through the chameleon hash function after the transaction is initiated and before being included in the block; the transaction deletion module is used to update the transaction content of the transaction, and Calculate the chameleon hash collision, and update the transaction content to be invalid, and calculate the chameleon hash collision to complete the deletion of the transaction. According to the system of the embodiment of the invention, it is possible to maintain the blockchain in time under special circumstances, delete junk data on the blockchain, ensure personal information security and the stable development of society, establish governance rules on the blockchain, and broaden the The applicable fields of blockchain are conducive to the healthy development of blockchain applications.

Description

technical field [0001] The invention relates to the technical field of alliance block chains, in particular to an editable block chain system and method based on multi-authorization center attribute encryption. Background technique [0002] At present, technologies such as smart contracts based on blockchain technology are in full swing and maturing, attracting the attention of a large number of experts and scholars at home and abroad. Blockchain is a mode of constructing a traceable block chain data structure, realizing and managing transaction processing in a peer-to-peer network environment through transparent and credible rules, with distributed decentralization, anti-counterfeiting and tamper-proof , transparent and credible and high reliability and other four typical characteristics. Among them, the immutability of blockchain data means that once the historical transaction data on the blockchain cannot be modified, this feature ensures the reliability and integrity of...

AI Technical Summary

Problems solved by technology

[0003] However, it is the immutability that hinders the promotion and application of the blockchain

First of all, immutability brings legal risks, and any illegal content embedded in the blockchain will never be deleted, which brings regulatory troubles to the regulatory authorities; secondly, the emergence of more and more smart contracts means that the program There must be loopholes, and once it is deployed, it cannot be modified. Finally, the European Commission proposed the "right to be forgotten" protection. The most basic requirement is that any private information about individuals can be completely deleted from the Internet, which means that the blockchain cannot The tampering feature will fundamentally conflict with laws and regulations similar to the "right to be forgotten", and needs to be improved urgently

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