Segurança e Escalabilidade em Sharding Blockchain

Abstract

The circulation of the real money, on paper, is decreasing, migrating to the virtual. As a result, the need for a secure way to carry out transactions without relying on a trusted third-party increase. The cryptocurrencies that emerged in 2009 with the Nakamoto protocol represent an alternative to this demand, however the initial proposal has a scalability problem that makes it impossible to compete with the credit card network. The need to confirm transactions means that a cryptocurrency that uses the traditional blockchain like Ethereum only has 20 to 30 transactions per second, far away from VisaNet which has around 1700 transactions per second. To solve the scalability, the concept of sharding was created. This work proposes to present some sharding models highlighting their particularities and security solutions. proposta SharPer, temos separado por "/" os valores considerando Crash Only Nodes e Byzantine Nodes.