Forward security editable blockchain construction method suitable for alliance chain

A forward security, construction method technology, applied in the field of blockchain, can solve problems such as trapdoor key management and secure computing collision

Active Publication Date: 2020-08-11
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 used

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  • Forward security editable blockchain construction method suitable for alliance chain
  • Forward security editable blockchain construction method suitable for alliance chain
  • Forward security editable blockchain construction method suitable for alliance chain

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Example Embodiment

[0080] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0081] like figure 1 As shown, the forward secure editable block chain construction method suitable for alliance chain includes the following steps:

[0082] S1. System initialization: generate system parameters, trapdoor key and public key of Chameleon hash function, and calculate and distribute secret shares;

[0083] S2. Determine whether a block needs to be added, if so, proceed to step S3, otherwise proceed to step S4...

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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the step S3, and otherwise, entering the step S4; S3, adding blocks by acquiring hash values; S4, judging whether historical content on an existing block needs to be modified or not, if yes, entering the step S5, and otherwise, entering the step S6; S5, modifying the content of the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...

Claims

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Application Information

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IPC IPC(8): H04L9/08H04L9/06H04L29/08
CPCH04L9/085H04L9/0891H04L9/0894H04L9/0643H04L67/1097H04L9/50
Inventor 张文芳巢锐王小敏马征
Owner SOUTHWEST JIAOTONG UNIV
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