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Reputation-based PBFT consensus system and method, and block chain data processing system

A reputation and consensus technology, applied in the blockchain field, can solve problems such as low fault tolerance rate, limited alliance chain network scale, large-scale and limited resource alliance chain consensus failure, etc., and achieve high security effects

Active Publication Date: 2019-05-17
XIDIAN UNIV
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Problems solved by technology

[0003] To sum up, the problems existing in the existing technology are: the current consortium chain network scale is limited, the fault tolerance rate is low, and it is easy to cause the consensus failure of large-scale and resource-limited consortium chains

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  • Reputation-based PBFT consensus system and method, and block chain data processing system

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[0051] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0052] In view of the limited scale and low fault tolerance rate of the current consortium chain network, it is easy to cause the consensus failure of large-scale and resource-limited consortium chains. Adopting the present invention to reach a consensus is not affected by the scale of the network, the consensus process will not cause waste of computing power, and the consensus result has higher security than the classic PBFT.

[0053] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0054] Such as figure 1 As shown, the reputation-based ...

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Abstract

The invention belongs to the technical field of block chains, and discloses a reputation-based PBFT consensus system and method, and a block chain data processing system. The method comprises the steps of designing a lightweight reputation evaluation model, and calculating a mixed reputation value of the node based on node importance and service feedback; selecting a part of nodes of which the reputation values are higher than a threshold value as participants of a classical practical occupancy fault-tolerant consensus mechanism; and running a PBFT consensus mechanism in the participant, achieving a consensus based on a new leader election and transaction verification method, and broadcasting a consensus result. Due to the fact that the classical PBFT consensus mechanism is limited in expandability, consensus is not affected by the network scale. Due to the fact that a node reputation evaluation method and a participant election method are added, the method has higher safety compared with a classical PBFT. The calculated node reputation can guide the next transaction, so that the computing power for evaluating the node reputation is effective computing power.

Description

technical field [0001] The invention belongs to the technical field of block chains, and in particular relates to a reputation-based PBFT (Practical Byzantine Fault Tolerance, PBFT) consensus system and method, and a block chain data processing system. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: blockchain is a distributed shared ledger, which has become a research hotspot in the industry due to its characteristics of decentralization and non-tampering. Blockchain technology is the product of a series of technical combinations, including P2P network technology, consensus mechanism, cryptography technology, smart contracts, etc., among which the consensus mechanism is called the soul of the blockchain. The consensus mechanism in the blockchain refers to a group of participants updating the overall state of the blockchain system based on the consistency of the blocks formed by the latest transaction set. A ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q20/06G06Q20/38G06Q20/40G06Q40/04
CPCY02D10/00
Inventor 沈玉龙佟威姜晓鸿董学文郑佳伟马诗洋刘启航赵六顺杨凌霄
Owner XIDIAN UNIV
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