A user can usually use them for payment without even being connected to a system. They replace carrying cash in which a cardholder can replenish the card with actual money. Encrypted credit cards hold the most promise for future payment over the web. Confidentiality of information, payment integrity and authenticity are requirements. They require a digit signature.
Electronic checks are equivalent to paper based checks.
Authentication and verification take place by using digital signatures and time stamping controls. Online We now can buy just about anything over the Internet but what about returning items. The returning process is one that electronic commerce sites have not quite figured out. When a customer receives a product and is not satisfied they want to be able to get online and let the company know they wish to return it. Well, in most cases the customer is not able to do this.