I think I might need one of these. They are the ones that let you run https from your domain, yes?

Where do you recommend I buy one from? My host is Carpathia hosting in the USA and my domain is a .com url if that makes any difference. Registerfly is my domain registrar.

Yes, an SSL cert let you use the HTTPS protocol. You need to generate a request from the domain in question and then install the certificate when you get it. Very simple (he says!!!), well, read and follow the instructions.

I've bought certificates from http://www.rapidssl.com and http://www.instantssl.com successfully. Use the free trial certificate from instantssl to make sure you can request and install certificates correctly.

They seem very expensive compared to others offering them for $9.99, such as registerfly.