
The next layer called middleman services layer, describes the design of home page of an organization and elaborates various payment services such as credit card, e cash, smart card, etc. It is also explained as to how the messaging layer is used to exchange structured electronic documents, using XML. Here various methods of encryption, public key infrastructure and digital signature are discussed. Above this is a very important messaging layer of e-commerce which provides facilities for exchanging messages securely using the communication infrastructure. The layer above is the network services layer which providesĮ-mail and World Wide Web applications. The next layer described is the logical layer consisting of Local Area Networks, the Internet, Intranet, etc. The physical layer (the bottommost layer) described first, provides the basic communication infrastructure needed by e commerce.

The book presents a layered architecture of e-commerce systems with six layers.

This book is designed to acquaint the readers with major aspects of e-commerce with particular emphasis on technology such as cryptography, e-payment and mobile payment security.
