- Blockchain (the magic notebook)
- A big shared notebook, copied word for word at thousands of people's homes.A line written in it appears at everybody's home, and can never be rubbed out.
- Block
- A bundle of lines from the notebook. It is a full train carriage.When the carriage is full, it is hooked on behind the one before.
- Chain of blocks
- The whole train: carriages hooked on one after another.Change an old carriage and every carriage behind it falls off.
- Decentralised
- With no single boss in the middle. The work is shared between everybody.Nobody in particular keeps the Bitcoin notebook.
- Cryptocurrency
- Digital money that lives in the magic notebook, with no bank. Its price goes up and down enormously. You learn about it to understand it, never to buy any.The sites that sell it are not allowed for anybody under 18.
- Bitcoin
- The first cryptocurrency. It was born in 2009.Nobody really knows who invented it.
- Mining
- The work of the computers that solve a number puzzle.The first one to solve it hooks its carriage onto the train.
- Miner
- A computer that does this work, and the person who runs it.The winner gets brand-new coins as a reward.
- Address
- A string of letters and numbers you can give to everybody. It is used to receive.It is like the number on your letterbox.
- Secret key (private key)
- A long string of letters and numbers that proves it really is you. You NEVER share it.If you lose it, it is lost for ever.
- Wallet
- A safe place that keeps your secret key. There is not a single coin inside it.A cold wallet stays offline, far away from thieves on the internet.
- Token
- A small digital thing created in the magic notebook.Like the tokens at a funfair, but written in the notebook.
- NFT
- A one-of-a-kind token. The notebook writes down who owns it.Anybody can copy the picture. The line in the notebook, no.