For implementation this is a bible: Handbook of Elliptic and Hyperelliptic Curve Cryptography. Note that there’s a big math gap between AES and, eg, implementi

For implementation this is a bible: Handbook of Elliptic and Hyperelliptic Curve Cryptography. Note that there’s a big math gap between AES and, eg, implementing ed25519. But if he likes this stuff, HEHCC will be a new joy every day. You can also find the pdf online, since it’s pretty expensive and you want to make a gift, maybe you can get the Singh and throw this pdf in as a bonus challenge :)