This is explanation from one SSL issuer website..about SSL levels..as you see there is no different in SSL itself..only in verification methods..nothing more..that is why you can generate CSR on your server( to protect and make sure you only have your key)and submit that CSR to generate SSL...
SSL is encryption...and 256 bit SSL generated on your server or Godaddy is same...othervise how your server will decript SSL you buy from someone....you are paying for verification from trusted source...and that is it...
for me it makes sence to go only for EV SSL with green bar because it makes at least your customer see that green bar....DV SSl is same like FreeSSL you get form let's Encrypt...and even broswer will tellyou that if you click on "more info"
I'm not sure what you don't understand here...
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Although all SSL certificates use similar methods to protect and validate your data, a useful way to categorize them is by validation method. Any certificate must be verified by the issuing Certificate Authority (or CA) to ensure that it is covering the correct, authorized site. This verification confirms at a minimum control of the domain. However, more steps can be taken to also confirm the existence of the requesting company or organization (for OV certificates) or to establish even more trust through extended vetting (for EV certificates)."
Level 1: Domain Validation or DV Certificates
This is the lowest level of authentication used to issue SSL certificates. The Certificate Authority (CA) will issue this certificate to anyone listed as the domain admin contact in the public record associated with a domain name. As a result, DV certificates are issued very quickly. No company information is checked or displayed on the certificate.
When to use DV Certificates:
Situations where trust and credibility are less important such as personal websites and small forums that need basic encryption for things like logins, forms or other non-transactional data.
Pros:
– Easy to obtain
– Fast issuance
Things to keep in mind:
– Use only for web-based applications that are not at risk for phishing or fraud.
– Avoid using for websites that handle sensitive data.
Level 2: Organization Validation or OV Certificates
OV is the more secure step up from DV. As well as checking up on ownership of the domain name, the Certificate Authority will also carry out additional vetting of the organization and individual applying for the certificate. This might include checking the address where the company is registered and the name of a specific contact. This vetted company information is displayed to visitors on the certificate, making ownership of the site much more visible.
When to use OV Certificates:
Public-facing websites dealing with less sensitive transactional data.
Pros:
– More thorough vetting process than DV.
– Company information is displayed to users.
– Provides a certain level of trust about the company who owns the website.
Things to keep in mind:
OV Certificates do not offer the highest visible display of trust like EV SSL (green browser bar).
Level 3: Extended Validation or EV Certificates
This is the gold standard in SSL certificates. EV verification guidelines, drawn up by the Certificate Authority/ Browser Forum, require the Certificate Authority to run a much more rigorous identity check on the organization or individual applying for the certificate. Sites with an EV SSL certificate have a green browser address bar and a field appears with the name of the legitimate website owner and the name of the Certificate Authority that issued the certificate.