Bitcoin, Cryptography, Cryptocurrency, Blockchain, Ethereum.
https://www.google.de/search?q=elliptic+curve+cryptography&source=lnms&tbm=isch&sa=X&ved=0ahUKEwi2lbW9iNHdAhUM2BoKHX3bAngQ_AUICigB&biw=1363&bih=239#imgrc=NSETzS5aoM6peM: You can also choose some point P on the curve and add it x-times to itself — you will still get a point located on the elliptic