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Originally Posted by SumDay
Can you explain it to me in English? Megacorp was getting into this a year or so before I retired, and I never did understand it.
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Not really. Even after a course I didn't fully get it. But, basically, it is a public ledger of transactions. Each transaction is cryptographically secured and as "blocks" of transactions are built up they are locked and verified with a cryptographic hash that further blocks must contain thus proving that the whole ledger is genuine. This is how Bitcoin transactions are verified. The Bitcoin Blockchain is just one of many. Some are public like Bitcoin's, others are private, used for corporate or other transaction records.
I never really got how the blockchain approaches could scale to deal with the sort of volume that enterprise applications support - like credit card transactions. We shall see.