Quotes On Blockchain

A block chain is a series of blocks. Each block is a series of computations done by computers all over the world using serious cryptography in a way that's very hard to undo.

The ledger, the distributed database - it's called a Blockchain - is held in the cloud by all the parties involved. It can't be broken by any of them. It's cryptographically too strong. You would have to compromise the entire network to take over Bitcoin.