Yeah, ok. That may have been a bad example, or it may be an indication that everything gets some application. I don't know how it relates to Schoof's algorithm. It isn't as far as I'm aware used in the algorithm or in the correctness proof but this is stretching my knowledge base. I don't have enough expertise to evaluate any claims about applying Etale cohomology to cryptography.

I'm not sure what to replace that example with. Stupid cryptographers going and making my field actually useful to people.