Block synchronization method and system

Abstract

The invention discloses a block synchronization method and a block synchronization system. A part of normal nodes in a block chain network become snapshoot nodes by the way of mortgaging digital currency, the snapshoot nodes perform snapshoot treatment on transaction information in a plurality of blocks in a snapshoot area, so that the snapshoot information of the blocks is acquired, and the snapshoot information is signed to acquire corresponding signature information; a newly added node acquires snapshoot information and corresponding signature information from the snapshoot nodes, verifiesthe signature information and the snapshoot information; if the verification is passed, and the quantity of the same snapshoot information is more than a certain number, the block is downloaded from the preset node, the snapshoot information passing the verification is used for verifying the downloaded block; if the verification is passed, the downloaded block is added into a block chain transcript of the node, so that the block synchronization security is enhanced, the problem that the false block is synchronized due to the inexistence of a credible node list used for generating the snapshootinformation is avoided, and the risk of suffering a Sybil attack is reduced.

Description

technical field [0001] The present invention relates to the technical field of the Internet, in particular to a block synchronization method and system. Background technique [0002] On a traditional blockchain network, nodes that are newly connected to the blockchain network need to synchronize blocks from neighboring nodes. During the block synchronization process, the new access node needs to verify the digital signature of each transaction in the downloaded block. Only after the verification is passed, the transaction will be added to the local transaction list. The time it takes to verify the digital signatures of all transactions is several times that of downloading blocks, which is very time-consuming, making the entire block synchronization time very long. [0003] The existing technology uses snapshot technology to overcome the above problems. However, there is no list of trusted nodes that generate snapshot information, so some fraudulent nodes may form false snap...

AI Technical Summary

Problems solved by technology

During the block synchronization process, the new access node needs to verify the digital signature of each transaction in the downloaded block. Only after the verification is passed, the transaction will be added to the local transaction list. The time it takes to verify the digital signatures of all transactions is several times that of downloading blocks, which is very time-consuming and makes the entire block synchronization time very long

[0003] The existing technology uses snapshot technology to overcome the above problems. However, there is no list of trusted nodes that generate snapshot information, so some fraudulent nodes may form false snapshot information, making new access nodes synchronize false blocks, that is, suffering from witch attack

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