If you are running an online retail site today you must be to be able to offer your customers' proof that you are taking the appropriate steps to protect their personal information and credit card data at all points during and after their transaction is completed. The most recognized way to do this is to use a certification authority that can provide you with a digital certificate that offers highest level of data encryption.
As you start shopping around for a certification authority, you should be looking for one that offers a minimum of 128 bit SSL encryption to protect all of the data being transferred. You should try to find one that has several verifiable years in the business like Digi-Sign, as you will find that by doing this you can offer every one of your customers the very latest in secure payment technology, this will give them the level of confidence needed to spend their money on your site.