#explain-card [[Satoshi nakamoto|Satoshi Nakamoto]] is the pseudonym used by the unknown individual or group who developed [[Bitcoin]]. Nakamoto authored the [Bitcoin white paper](https://bitcoin.org/bitcoin.pdf) and created and deployed Bitcoin's original reference implementation. As part of this implementation, Nakamoto also devised the first blockchain database. By solving the double-spending problem for digital currency using a peer-to-peer network, Nakamoto made a significant breakthrough. Nakamoto remained active in Bitcoin's development until December 2010.