Elliptic Curve Cryptography for Beginners
As nice as it is, integers are not a field (i.e. most of them don't have multiplicative inverses, or 1/n usually isn't integral).<p>Another good writeup:
<a href="http://andrea.corbellini.name/2015/05/17/elliptic-curve-cryptography-a-gentle-introduction/" rel="nofollow">http://andrea.corbellini.name/2015/05/17/elliptic-curve-cryp...</a>