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A payment gateway is a merchant service provided by an e-commerce application service provider that authorizes credit card or direct payments processing for e-businesses, online retailers, bricks and clicks, or traditional brick and mortar. The payment gateway may be provided by a bank to its customers, but can be provided by a specialised ...

Methods of online payment. There are varied types of electronic payment methods such as online credit card transactions, e-wallets, e-cash and wireless payment system. Credit cards constitute a popular method of online payment but can be expensive for the merchant to accept because of transaction fees primarily.

A payment terminal, also known as a point of sale (POS) terminal, credit card terminal, EFTPOS terminal (or by the older term as PDQ terminal which stands for "Process Data Quickly" ), is a device which interfaces with payment cards to make electronic funds transfers. The terminal typically consists of a secure keypad (called a PINpad) for ...

Shopping cart software is a piece of e-commerce software on a web server that allows visitors to have an Internet site to select items for eventual purchase. The software allows online shopping customers to accumulate a list of items for purchase. At the point of sale, the software typically calculates a total for the order, including freight ...

Authorization is the responsibility of an authority, such as a department manager, within the application domain, but is often delegated to a custodian such as a system administrator. Authorizations are expressed as access policies in some types of "policy definition application", e.g. in the form of an access control list or a capability, or a ...

Web application security is a branch of information security that deals specifically with the security of websites, web applications and web services. At a high level, web application security draws on the principles of application security but applies them specifically to internet and web systems. Web Application Security Tools are specialized ...