- Should we rename ecc to elliptic-curve-crypto?
- Should we merge them?
- If we keep both, when should we use elliptic-curves? In particular should questions tagged with ecc tagged with both? Or should we reserve elliptic-curves for questions about the mathematical background of elliptic curves?
Merging the two sounds like a good choice to me. This site is about cryptography. If someone has a question about elliptic curves, it should relate to cryptography. Thus the ECC tag should handle all elliptic curve questions. On the off chance that someone asks a question about elliptic curves that has nothing to do with cryptography, we should migrate it to Math.SE.
The one argument I see for having separate tags is that the ECC tag could relate more to accepted ECC standards and the elliptic-curves tag could relate to more of the foundations of elliptic curves and the theory of how they are/can be used in cryptography.
That said, I still prefer the former.