Forward security editable blockchain construction method suitable for alliance chain

Abstract

The invention discloses a forward security editable blockchain construction method suitable for an alliance chain. The method comprises the following steps: S1, initializing a system; S2, judging whether a block needs to be added or not, if so, entering the step S3, and otherwise, entering the step S4; S3, adding blocks by acquiring hash values; S4, judging whether historical content on an existing block needs to be modified or not, if yes, entering the step S5, and otherwise, entering the step S6; S5, modifying the content of the historical block on the blockchain through the collision valueof the chameleon hash function of the to-be-modified block; S6, updating the secret share of the alliance chain participating user, and completing forward editing of one updating period. According tothe method, the trap door secret key is stored in a distributed manner by adopting a secret sharing technology, and compared with a secure multi-party computing protocol, the structure of computing collision in the method not only protects the trap door secret key and the secret share from being leaked, but also has fewer interaction times and lower computing overhead.

Description

technical field [0001] The invention relates to the field of block chains, in particular to a forward-safe editable block chain construction method suitable for alliance chains. Background technique [0002] Blockchain is a distributed shared ledger technology that uses a consensus algorithm to generate data, uses a chain structure to store data, and uses a cryptographic algorithm to ensure data security. It realizes point-to-point transactions in a distributed network without trusted nodes. Function. Because the blockchain has the advantages of trustlessness, decentralization, time series data, security and credibility, and solves the problems of poor reliability and low security in the traditional centralized model, it has received widespread attention. With its many advantages, blockchain has developed rapidly, from blockchain 1.0 represented by Bitcoin, to blockchain 2.0 represented by Ethereum, which introduces smart contracts, to dedicated to providing services for al...

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Problems solved by technology

[0012] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a forward-safe editable block chain construction method suitable for consortium chains, which solves the problem of trapdoor key management and secure calculation collisions in editable block chains

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