Yu-Yan Zhang
ABSTRACT
Using blockchain technology to build a trusted transaction foundation has become a hot topic of current research and practice. The double-spending phenomenon refers to the bifurcation of the blockchain structure. In the process of trusted transactions, the fork caused by malicious attacks will destroy the correctness, integrity, and consistency of the entire ledger, and causes serious economic losses to users. Therefore, eliminating double-spending attacks is an important issue to ensure the security of the blockchain. The current method of defending against double-spending attacks in trusted transactions mainly revolves around the Bitcoin blockchain system. In the process of researching the Nano blockchain grid project, a high-throughput trusted transaction system, we proposed a double-spending elimination solution for the system: the occupying mechanism. By using Java to reconstruct the Nano project and implement the occupying mechanism, the experimental results verify the effectiveness of the occupying mechanism, and it is superior to the Nano project's double-spending solution based on the traditional voting mechanism in terms of time performance.
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