Why do I need SSL?
If you are transmitting sensitive information on a web site, such as credit card numbers or personal information, you need to secure it with SSL encryption. It is possible for every piece of data to be seen by others unless it is secured by an SSL certificate.
Your customers won't trust your web site without an SSL certificate. According to Gartner Research, nearly 70 percent of online shoppers have terminated an online order because they did not "trust" the transaction. In those cases, 64 percent indicated that the presence of a trust mark would have likely prevented the termination. An SSL certificate and a site seal could stop people from abandoning your website and that means more money for you. Read our why SSL is necessary page to learn more.
What is a certificate authority (CA)?
A certificate authority is an entity which issues digital certificates to organizations or people after validating them. Certification authorities have to keep detailed records of what has been issued and the information used to issue it, and are audited regularly to make sure that they are following defined procedures. Every certification authority provides a Certification Practice Statement (CPS) that defines the procedures that will be used to verify applications. There are many commercial CAs that charge for their services (VeriSign). Institutions and governments may have their own CAs, and there are also free Certificate Authorities.
Every certificate authority has different products, prices, SSL certificate features, and levels of customer satisfaction. Read our SSL Certificate reviews to find the best provider to purchase from.
How do SSL Certificates compare between certificate authorities?
Verisign certificates are better because they cost so much more, right? Not necessarily. You can get a certificate for $100 that does that exact same thing as a certificate sold for $800 from another certificate authority. It is the exact same SSL encryption.
Why the difference? Trust is the biggest difference. Since VeriSign has been around for longer than other certificate authorities, more people trust them so they can charge more. You are essentially paying for the brand.
What is browser compatibility?
The certificate that you purchase to secure your web site must be digitally signed by another certificate that is already in the trusted store of your user's web browsers. By doing this, the web browser will automatically trust your certificate because it is issued by someone that it already trusts. If it isn't signed by a trusted root certificate, or if links in the certificate chain are missing, then the web browser will give a warning message that the web site may not be trusted.
So browser compatibility means that the certificate you buy is signed by a root certificate that is already trusted by most web browsers that your customers may be using. Unless otherwise noted, the certificates from all major certificate providers listed on SSL Shopper are compatible with 99% of all browsers. For more details about a specific certificate provider, see SSL Certificate Compatibility.