Papel da tecnologia de cadeia de blocos na medicina e na medicina dentária
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Uma cadeia de blocos é um livro-razão distribuído e público, que regista transacções e rastreia activos, e cuja imutabilidade é garantida por uma rede de computadores peer-to-peer, e não por qualquer autoridade centralizada. Os activos podem ser tangíveis, como casas ou dinheiro, ou podem ser intangíveis, como patentes ou direitos de autor. Uma cadeia de blocos consiste em registos ordenados dispostos numa estrutura de blocos. Cada bloco de dados contém um hash (impressão digital ou identificador único), lotes de transacções recentes com carimbo de data/hora e um hash do bloco anterior. Com esta conceção, cada bloco está ligado por ordem cronológica e os blocos ligados são designados por cadeia de blocos. É praticamente impossível modificar um dos blocos no meio da cadeia porque todos os blocos após o bloco modificado devem ser modificados ao mesmo tempo. Um contrato inteligente é um protocolo informático que é executado automaticamente quando os pré-requisitos são cumpridos, e é uma entidade separada da tecnologia original da cadeia de blocos. O contrato inteligente foi adotado como uma função-chave da cadeia de blocos 2.0, expandindo a aplicação da tecnologia da cadeia de blocos para além da moeda criptográfica.
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