Certificate classification
DV OV EV
1)DV
DV certificate of review time will be very fast, usually a few minutes. DV certificate criticism is that the CA will not conduct a rigorous review of the applicant's identity, some malicious attacker will by some means (such as DNS hijacking) posing as a server to request a certificate from a CA mechanism. DV is more suitable for personal website.
2）OV
CA identity of the applicant organization will conduct a rigorous review (Qualification of the applicant, business address, etc.), thereby providing a more secure confidence to the user. Review time required 1-3 days.
3）EV
CA identity of the applicant organization will be more stringent audit, general banking, electricity, government will apply for EV certificates. Application Period 7 days.
Classified according to the number of hosts
1) single-domain certificates include a certificate for a domain name
2) pan-domain certificate * .example.com support www1.example.com www2.example.com
doubt? www1.www.example.com www2.www.example.com can not be combined to example.com, www.example.com need to merge
3) SAN certificates can be different registered domains into a certificate, www.example.com www.example.cn merged into a certificate. This certificate can also be called multi-domain certificate.
4) SAN pan-domain certificate www.example.com www.example.cn * .example.org merged into a certificate.