we can break credit card payment on on-line networks into three basic categories:----
1.Payments using plain credit card detail. The easiest method of payment is the exchange of unencrypted credit card over a public network such as telephone lines or the internet .The low level of security inherent in the degin of the internet makes this method problematic.
2.Payments using encrypted credit card detail.It would make sense to encrypt your credit card detail before sending them out,but even then there are certain factors to consider.One would be the cost of a credit card transaction itself.
3.Payments using third party verification .One solution to security and verification problems is the introduction of a third party :a company that collects approves payments from one client to another.