If you want to secure an infinite number of sub domains on a single domain name, a Wildcard SSL certificate comes in handy. It brings with it numerous advantages but there are two sides to every coin; so there are a few shortcomings to this certificate as well.

The good news first:

-> Security for ‘n’ number of Sub – Domains

Let’s face it, buying a single Certificate for each new sub domain is going to prove to be a costly exercise. When you go for a Wildcard SSL certificate, it provides a security cover for all your sub-domains, irrespective of their number.

-> Cost Effective

Using this certificate will prove to be much cheaper than buying a new certificate for each one of your sub domains.  If you choose the right certificate provider you might also be offered the advantage of unlimited server license. What this means is that a single Wildcard SSL certificate can be used on several web servers.

-> Convenient Management

Imagine the difficulty in deploying a new SSL certificate for every sub-domain you might have or plan to get. It’s a task that is simplified by the Wildcard certificate.

Now for the bad news:

-> Vulnerability

Wildcard offers users the benefit of a single certificate that can be used across multiple sub domains on a single domain name.  But there is catch – There is just one private key. What this means is that it increases the vulnerability of your domains.  If one server gets compromised, so do the others.

There is also a silver lining in the form of a unique private key. You could search for certificate providers who give you the option of generating new Wildcard certificates albeit with the same domain name. Each certificate will have a unique key, thus decreasing the vulnerability associated with it.

-> Compatibility Issues

If you are looking for mobile device compatibility, there might be a problem. There are some mobile OS that don’t support the Wildcard SSL certificate. But here again, you have an option of choosing specific Wildcard certificates offered by certain companies. These certificates offer you a way out of the problem.

Knowing about the pros and cons of using a Wildcard SSL certificate will help you make an informed decision as to whether you should use it or not.