ssl证书是否可以用免费ssl证书，亦或者是认证过签发的证书？ || Can I use a free SSL certificate for the SSL certificate, or is it a certified and issued certificate?

ssl证书是否可以用免费ssl证书，亦或者是认证过签发的证书？ || Can I use a free SSL certificate for the SSL certificate, or is it a certified and issued certificate? #58