The only concern here is..."We do not -- at least not yet -- but I strongly believe that the NSA has a significant advantage in breaking ECC. This doesn't mean it's bad, but I think we need to 1) make sure we know where our curves come from, and 2) build in a hefty security margin."
"Prefer symmetric cryptography over public-key cryptography." - Bruce Schneier https://www.schneier.com/blog/archives/2013/11/elliptic_curve.html https://www.schneier.com/blog/archives/2013/09/the_nsa_is_brea.html
