I also would like to share about the several ways to ensure that your credit card transactions will be safe whenever you process your payment online.
Try to make use of the latest browser using an up to date encryption technology. You can check if you are on a secure SSL (or Secure Socket Layer â€“ an Internet security protocol web servers use in transmitting sensitive information) by looking at the URL. This should be changing from http to https. There should also be a small lock icon at the status bar in the bottom of your browser window.
You can also look for the signs authenticating the identity of the services you are dealing with. For example, you may click on the VeriSign logo to assure that the site is not a clone of the company trying to collect your financial or personal data.
On my part, I try to use one credit card, instead of several, for all of my online transactions and that the card I am using is on a limited credit line.
Hope this helps.