Cryptography
Hash functions, keys, signatures and the elliptic curves that underpin Bitcoin.
- 1 Hash functions Interactive The one-way digital fingerprint — try it live.
- 2 Private & public keys A secret you keep, a name you can share.
- 3 Digital signatures Prove you authorised something, without revealing your secret.
- 4 Encryption & decryption Scrambling messages — and why Bitcoin barely uses it.
- 5 Elliptic curves Interactive The trapdoor maths linking your public and private keys.