Glossary

ProgrammableWeb's glossary of API and other technology terms and defination
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Blockchain

A blockchain (originally block chain) is a growing distributed database of records, called blocks, that are linked using cryptography and which exist on multiple computers at the same time. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data, forming an actualy chain of multi-layered data. By design, a blockchain is resistant to modification of the data.