[1] RFC 7748 - Elliptic Curves for Security (2016-01-23 11:12:11 +09:00 版) https://tools.ietf.org/html/rfc7748

[2]

Security/Server Side TLS - MozillaWiki (2018-09-06 16:01:07 +09:00) https://wiki.mozilla.org/Security/Server_Side_TLS

We recommend ECDSA certificates with P256 as other curves may not be supported everywhere. RSA signatures on ECDSA certificates are permitted because very few CAs sign with ECDSA at the moment.

[3] curl - How To Use, 2020-09-21T09:01:13.000Z, 2020-10-01T06:08:06.147Z https://curl.haxx.se/docs/manpage.html#--curves