These key lengths refer to the strength of the private key. You can think of it as the size of the cypher being used to encode your messages. Obviously, 2048-bit private keys are exponentially more secure than 1024-bit ones and are the new standard across the industry and are required during the generation process.
256-bit encryption is a server configuration. This has nothing to do with the certificate itself, it is based on your server configuration. To learn this, you should seek information provided by your webhosting platform or operating system. They will inform you how to set this encryption strength up.
Wildcard SSL certificates can cover one main domain (www.domain.com) and an unlimited amount of subdomains (mail.domain.com, login.domain.com, test.domain.com, etc.). Multi-domain (SAN) SSL certificates can cover multiple domains on just one certificate. For example, Symantec and Thawte multi-domain certificates can cover up to 250 domains. GeoTrust multi-domain certificates can cover anywhere from 25 to 250 domains, depending on the type of certificate you order.
Multi-domain or SAN (Secure Alternate Name) SSL certificates can cover multiple domain names on just one certificate. For example, Symantec and Thawte multi-domain certificates can cover up to 250 domains. GeoTrust multi-domain certificates can cover anywhere from 25 to 250 domains, depending on the type of certificate you order.
Wildcard SSL certificates can cover one main domain name (www.domain.com) and an unlimited amount of subdomains (mail.domain.com, login.domain.com, test.domain.com, etc.).
GeoTrust and RapidSSL both offer coverage for www and non-www. As long as the certificate is generated with www as the common name, the non-www version will automatically be covered. This is not the case, however, for Symantec and Thawte certificates. You will to purchase separate certificates to cover both the www and non-www common name for either of those brands. Comodo certificates also automatically cover www and non-www.
The main criteria for qualifier for an EV certificate would be that your business is an official company registered with a government authority. Also, if you’re a Sole Proprietor or a Partnership registered in the U.K., you cannot qualify for any EV SSL certificate.
The only way to get the green address bar on your website is with an Extended Validation (EV) certificate. These are the only type of SSL certificate that come with the green address bar.
EV stands for Extended Validation and is the most premium type of SSL certificate available. These certificates are identified on websites mainly by the green address bar, the most universally recognized symbol of trust on the web. EV certificates are becoming more and more commonplace in the industry, especially amongst ecommerce sites, as they are used by some of the most trusted sites in the world like Bank of America, Twitter, Paypal, and more. These certificates require that a company complete a thorough vetting process before being issued.
An Organization Validated (OV) SSL certificate requires that a business complete a light vetting process by the Certificate Authority before being issued. These certificates are a nice middle-ground between DV and EV certificates, as they aren’t as expensive as EV options but still offer more SSL and trust indications than basic DV options. These certificates typically take between 2-3 days to be issued.