A forward-safe editable blockchain construction method suitable for consortium chains

A technology of forward security and construction method, which is applied in the blockchain field, can solve problems such as trapdoor key management and secure calculation collisions, and achieve the effects of improved security, low computing overhead, and fewer interactions

Active Publication Date: 2021-06-15
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 suitable for consortium chains, which solves the problem of trapdoor key management and secure calculation collisions in editable block chains

Method used

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  • A forward-safe editable blockchain construction method suitable for consortium chains
  • A forward-safe editable blockchain construction method suitable for consortium chains
  • A forward-safe editable blockchain construction method suitable for consortium chains

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Embodiment Construction

[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] Such as 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...

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Abstract

The present invention discloses a forward secure editable block chain construction method suitable for consortium chains, which includes the following steps: S1, system initialization; S2, judging whether blocks need to be added, if so, enter step S3, otherwise enter step S4; S3, increase the block by obtaining the hash value; S4, judge whether the historical content on the existing block needs to be modified, if so, go to step S5, otherwise go to step S6; S5, pass the chameleon of the block to be modified The collision value of the Greek function modifies the content of the historical block on the block chain; S6, updates the secret share of the participating users of the alliance chain, and completes the forward editing of an update cycle. The present invention uses secret sharing technology to store trapdoor keys in a distributed manner. Compared with secure multi-party computing protocols, the structure of calculation collisions in the present invention not only protects trapdoor keys and secret shares from being leaked, but also has less interaction times and lower computational 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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Patent Type & Authority Patents(China)
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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