[1] 478225 - Chrome TLS no longer supports secp521r1 in elliptic curve certificates - chromium - Monorail (2018-09-06 23:19:53 +09:00) https://bugs.chromium.org/p/chromium/issues/detail?id=478225

[2] 477623 - Security: With Chrome 42 Elliptic curves secp512r1 missing - chromium - Monorail (2018-09-06 23:20:40 +09:00) https://bugs.chromium.org/p/chromium/issues/detail?id=477623