What are Block Identifiers?

Asked 18-May-2022
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  • The cryptographic hash, or digital fingerprint, of a block is created by hashing the block header twice using the SHA256 method. The resulting 32-byte hash is known as the block hash, but it is more appropriately known as the block header hash because it is computed using only the block header.
  •  The block hash uniquely and unambiguously identifies a block and can be determined independently by any node by simply hashing the block header.
  • The block hash is not really included inside the block's data structure, neither when it is broadcast over the network nor when it is kept as part of the blockchain on a node's persistence storage. Instead, each node computes the hash of the block as it is received from the network.


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