区块链面临可拓展性问题.分片通过将区块链网络划分成多个子网络,并行处理交易,从而提升系统性能.但分片易导致恶意节点聚集,发动51%攻击,影响系统安全,现有的单维信誉方案存在重分配过程开销大和分片间共识不足的问题,性能与安全无法保...区块链面临可拓展性问题.分片通过将区块链网络划分成多个子网络,并行处理交易,从而提升系统性能.但分片易导致恶意节点聚集,发动51%攻击,影响系统安全,现有的单维信誉方案存在重分配过程开销大和分片间共识不足的问题,性能与安全无法保证.针对上述问题,提出基于多维信誉的区块链安全分片方案.首先,综合节点多维指标,保证分片信誉与计算通信能力均衡,识别恶意节点.其次,提出双阶段重分配方案,通过第1阶段部分重分配和第2阶段全部重分配,减少重分配频次,降低开销.最后,设计基于多维信誉的快速拜占庭容错共识(multi-dimensional reputation based fastByzantinefault-tolerantconsensus,MRFBFT),将投票权与信誉结合,并在分片领导节点间增设一次共识,防止恶意行为.实验结果表明,各分片信誉和计算通信水平更均衡,共识时延大约降低20%,吞吐量提升15%左右.展开更多
In the 21st century,increasingly significant or entirely new global issues have continued to emerge and accumulate.In response to the spread of global crises such as terrorism,nuclear proliferation,the refugee crisis,...In the 21st century,increasingly significant or entirely new global issues have continued to emerge and accumulate.In response to the spread of global crises such as terrorism,nuclear proliferation,the refugee crisis,climate change,and the spread of disease,the existing global governance system“has lost the momentum for progress.”*1 Its effectiveness under the leadership of certain Western countries has begun to be questioned by many parties and has fallen into a dilemma marked by stagnation.The reform of the global governance system has become an inevitable requirement for international relations.With today?s unprecedented changes,not only are global financial,developmental,and ecological issues constantly erupting,but the sudden emergence of the new COVID-19 virus poses a serious threat to human health and safety.In this context,the world is obviously facing instability and uncertainty,and the reform o f the global governance system is at a historical turning point.The existing global governance mechanisms have been unable to adapt to the new complex and diverse situation,and the old global order is further disintegrating.China is actively promoting for the reform of the global governance system to build a community with a shared future for mankind that will lead the world into a new global governance structure.It is also an important practice of China's major-country diplomacy with Chinese characteristics in the new era.展开更多
文摘区块链面临可拓展性问题.分片通过将区块链网络划分成多个子网络,并行处理交易,从而提升系统性能.但分片易导致恶意节点聚集,发动51%攻击,影响系统安全,现有的单维信誉方案存在重分配过程开销大和分片间共识不足的问题,性能与安全无法保证.针对上述问题,提出基于多维信誉的区块链安全分片方案.首先,综合节点多维指标,保证分片信誉与计算通信能力均衡,识别恶意节点.其次,提出双阶段重分配方案,通过第1阶段部分重分配和第2阶段全部重分配,减少重分配频次,降低开销.最后,设计基于多维信誉的快速拜占庭容错共识(multi-dimensional reputation based fastByzantinefault-tolerantconsensus,MRFBFT),将投票权与信誉结合,并在分片领导节点间增设一次共识,防止恶意行为.实验结果表明,各分片信誉和计算通信水平更均衡,共识时延大约降低20%,吞吐量提升15%左右.
文摘In the 21st century,increasingly significant or entirely new global issues have continued to emerge and accumulate.In response to the spread of global crises such as terrorism,nuclear proliferation,the refugee crisis,climate change,and the spread of disease,the existing global governance system“has lost the momentum for progress.”*1 Its effectiveness under the leadership of certain Western countries has begun to be questioned by many parties and has fallen into a dilemma marked by stagnation.The reform of the global governance system has become an inevitable requirement for international relations.With today?s unprecedented changes,not only are global financial,developmental,and ecological issues constantly erupting,but the sudden emergence of the new COVID-19 virus poses a serious threat to human health and safety.In this context,the world is obviously facing instability and uncertainty,and the reform o f the global governance system is at a historical turning point.The existing global governance mechanisms have been unable to adapt to the new complex and diverse situation,and the old global order is further disintegrating.China is actively promoting for the reform of the global governance system to build a community with a shared future for mankind that will lead the world into a new global governance structure.It is also an important practice of China's major-country diplomacy with Chinese characteristics in the new era.
