Secured domains:allows the protection of subdomains. All SSLs allow single domain protection. All subdomains of the domain are protected in the Wildcard.
Sure:the certification authority has insurance for cases where the certificate may have some invulnerability with its encryption.
Authentication method:is the authentication information of the certificate. The domain name appears in the most common. In advanced SSLs, the information on the certificate is your company's data.
Installation time:SSLs need time to be validated by the certification authority and then installed. This time depends on the type of SSL and the complexity of the SSL. In the InstantSSL Premium and Extended Validation SSL, the certification authority takes a few days to check your company's information.
Encryption:the level of encryption of SSL. In all SSLs encryption is up to 256 bits.
Price:This price is the high cost of SSLs This price is annual, so the price must be paid once a year.