CloudFlare 发布了证书透明度监控服务 - 可以在 Dashboard 的 Crypto tab 里面设置启用；你将会在 CA 为你的域名签发 SSL 证书的时候收到通知
https://blog.cloudflare.com/introducing-certificate-transparency-monitoring/
https://blog.cloudflare.com/introducing-certificate-transparency-monitoring/
The Cloudflare Blog
Introducing Certificate Transparency Monitoring
When CAs make mistakes, illegitimate certificates may be issued. If a CA accidentally issues a certificate for your website, but you did not request the certificate, you have a problem.