Ruolo della tecnologia a catena di blocchi in medicina e odontoiatria
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Una catena di blocchi è un libro mastro pubblico e distribuito che registra le transazioni e traccia i beni e la cui immutabilità è garantita da una rete di computer peer-to-peer e non da un'autorità centralizzata. I beni possono essere tangibili, come case o contanti, o intangibili, come brevetti o copyright. Una catena di blocchi è costituita da record ordinati disposti in una struttura a blocchi. Ogni blocco di dati contiene un hash (impronta digitale o identificatore univoco), lotti di transazioni recenti con marcatura temporale e un hash del blocco precedente. Con questa struttura, ogni blocco è collegato in ordine cronologico e i blocchi collegati sono chiamati catena di blocchi. È praticamente impossibile modificare uno dei blocchi nel mezzo della catena, perché tutti i blocchi successivi a quello modificato devono essere modificati contemporaneamente. Con questo meccanismo, i dati della rete a catena di blocchi sono immutabili. Uno smart contract è un protocollo informatico che viene eseguito automaticamente quando sono soddisfatti i prerequisiti, ed è un'entità separata dalla tecnologia originale della catena di blocchi. Lo smart contract è stato adottato come funzione chiave della Block chain 2.0, espandendo l'applicazione della tecnologia a catena di blocchi oltre la criptovaluta.
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