With copies of the data in all users' hands, the overall database remains
safe even if some users are hacked. This tamper-proof, decentralized feature has made
blockchain increasingly popular beyond its original function supporting bitcoin digital transactions.
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Blockchains rely heavily on cryptography to achieve their data security. ... Therefore, the hash of each block is generated based on both the data contained within that block and the hash of the previous block. These hash identifiers play a major role in ensuring blockchain security and immutability.
