“DV” certificate is Domain Validation, and it is a certificate that is issued after verifying only a simple DCV check for domain ownership/management rights. It is inexpensive, and there is no need to submit documents, just passing the Email/DNS/HTTP authentication method stipulated by the certification authority CA will complete the issuance.
The “OV” certificate is Organization Validation, and it is a certificate issued after not only checking the domain ownership/management authority DCV, but also checking the entity (existence) of the institution (company, company) that applied for the certificate. The product price is relatively higher than that of DV, and it is mandatory to go through document review and telephone certification by the certification body CA. It usually takes 2-5 business days for issuance.
As for the technical operation of the SSL certificate itself (network encryption), there is no difference between DV and OV, and it is completely the same. The only difference is that the information text of the institution (company, company) due to the difference in the DV and OV certification examination process is more indicated in the detailed information of the SSL certificate.
Also, there is no such thing as OV, EV audited SSL certificates with higher encryption security or better. The part where additional information is displayed in the web browser only for OV and EV certificates is a simple indication, and such information has absolutely nothing to do with the operation of SSL encryption.
“DV” SSL Certificate Advantages: Low price, simple verification, fast issuance. usually low indemnity
Advantages of “OV” SSL certificate: Added simple notation of authority (company, company) information to detailed certificate information. usually high indemnity
Advantages of “EV” SSL certificate: Added simple notation of organization name information in web browser address bar. Usually maximum compensation
“Different level of encryption security”: No difference because it is the same operation by RFC industry standard technology