Blockchain technology has been gaining great interest from a variety of sectors, including healthcare, supply chain and cryptocurrencies. However, Blockchain suffers from its limited ability to scale (i.e. low throughput and high latency). Several solutions have been appeared to tackle this issue. In particular, sharding proved that it is one of the most promising solutions to Blockchain scalability. Sharding can be divided into two major categories: (1) Sharding-based Proof-of-Work (PoW) Blockchain protocols, and (2) Sharding-based Proof-of-Stake (PoS) Blockchain protocols. The two categories achieve a good performances (i.e. good throughput with a reasonable latency), but raise security issues. This article attends that analyze the security of the second category. More specifically, we compute the probability of committing a faulty block and measure the security by computing the number of years to fail. Finally, to show the effectiveness of the proposed model, we conduct a numerical analysis and evaluate the results obtained.
翻译：包括医疗保健、供应链和加密在内的各个部门对链链技术的兴趣一直非常大,然而,链链因规模能力有限(即低吞量和高悬浮度)而受到影响。若干解决办法似乎已经解决这个问题。特别是,碎片化证明它是阻碍链伸缩的最有希望的解决办法之一。碎片化可以分为两大类:(1)基于碎片的“工作证据”链规程,(2)基于碎片化的“获取证据”(POS)链规程。这两类方案都取得了良好的绩效(即:良好的吞吐量与合理的延缓度),但提出了安全问题。这篇文章分析了第二类的安全性。更具体地说,我们算算出一个错误块的可能性,并通过计算失败年数来衡量安全性。最后,为了显示拟议模式的有效性,我们进行了数字分析并评估所取得的结果。
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