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Consensus Protocols: PoW vs PoS
By Bob Bonomo, CEO, Blockchain Innovation Group and President, Bob Bonomo LLC Blockchains are examples of distributed database technology, since they store transactional data across many computers rather than in a single, centralised system. In traditional centralised systems, where services run or data is stored on a single server, there is no concern about data synchronisation: all the data is simply present on that one machine. The distributed nature of blockchains improves data security, since the multiple copies of data make it extremely difficult and costly to tamper with or introduce forged transactions, while also increasing network reliability/uptime, since blockchains are resilient and continue to function if a manageable set of nodes become unavailable.

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