Server certificates are issued by the following authorities: Thawte, TBS X509, Symantec, Geotrust, Comodo, GlobalSign and Certigna.
Server certificates enable a website owner to be identified, and establish encrypted transactions between internet users and the site.
When you visit the website of a well-known brand, you have no way of knowing if it actually belongs to that brand. The site could have been hijacked.
Server certificates help to resolve this issue. Delivered by trusted authorities and using high levels of authentication, they guarantee that checks have been carried out to confirm that the organization exists, is legal, is the rightful owner of the website name and is the only party to hold the certificate.
These checks are certified on the date on which the certificate is issued, and the certification authority is therefore liable for them.
This is why a certificate with strong authentication is crucial to establishing a trust environment for remote transactions.