Blockchain might seem like magical fairy dust that companies throw about that suddenly sparks interest in their businesses. But the complexities of fairy dust far exceed the real inner workings of blockchain technology.A blockchain is a distributed public ledger that uses cryptography to ensure the record is practically immutable. The idea was created by an anonymous programmer that goes by the pseudonym Satoshi Nakamoto, and it's the underlying technology that makes peer-to-peer bitcoin transfers possible without the need for financial institutions to verify transactions.