Blockchain may be one of the biggest tech buzzwords of the decade. But it's not as complicated as you may fear. Pieces of data, blocks, that follow one another chronologically are connected (the chain part) via cryptographic hashes. Each block has a cryptographic hash of the previous block, providing the ability to verify the validity of the chain. We explain the only tricky part of that description, the cryptographic hash function, and also explain why blockchain is only part of the underlying technology of bitcoin. Finally, we consider other applications of blockchain technology.
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