Bifalgorithm post · Crystal · Building the Blockchain

Why does each block link to the previous block?

Why does each block link to the previous block? (Crystal · Building the Blockchain) — "When a miner finds a valid block hash, the new block includes the hash o…

Ideas in this flowchart

  • Blockchain blocks are linked to provide resistance to tampering.
  • A miner finds a valid block hash.
  • A new block is created.
  • The new block includes the hash of the preceding block.
  • The new block receives the next sequential block number.
  • The sequential block becomes mathematically linked to its predecessor.
  • The underlying data may undergo even a minor change.
  • The changed data produces a different hash.
  • Changing an earlier block alters its hash.
  • The altered hash disrupts the mathematical links.
  • The disruption extends to every later block.
  • The later blocks no longer match the altered history.
  • The network recognizes the established blockchain chain.
  • The altered history no longer matches the chain recognized by the network.
  • Tampering with the blockchain history becomes difficult.
  • The blockchain is highly resistant to tampering.
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Why does each block link to the previous block?

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Crystal

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"When a miner finds a valid block hash, the new block includes the hash of the preceding block and receives the next sequential block number. Because even a minor change to underlying data would alter its hash, changing an earlier block would disrupt the mathematical links connecting it to every later block. This structure makes the blockchain highly resistant to tampering because an altered history would no longer match the chain recognized by the network."

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