Reference: https://eprint.iacr.org/2013/647.pdf and https://safecurves.cr.yp.to/ Reasoning: Most curves included in PyECC is not secure, it might be a good idea to provide alternatives. - [ ] M191 - [ ] M-221 - [ ] Curve25519 - [ ] M-383 - [ ] M-511 - [ ] E-191 - [ ] E-222 - [ ] Curve1174 - [ ] E-382 - [ ] E-521