https://stackoverflow.com/questions/58755669/how-to-get-an-elliptic-curve-public-key-from-a-private-key
https://stackoverflow.com/questions/58755669/how-to-get-an-elliptic-curve-public-key-from-a-private-key
https://www.tribunalconstitucional.pt/tc/file/Relatorio_PR2021_AndreVentura_vf.pdf?src=1&mid=8303&bid=7012