The growth of users connected to the Internet with a high bandwidth connection hasfavored
the increase of multimedia services. As many of these services are provided by means of …

In the session initiation protocol (SIP), payments have been proposed as a way for vendors
to obtain profit from the services they provide. Payments in SIP have also been proposed for …

The Session Initiation Protocol (SIP) is used to set up realtime sessions in IP-based
networks. These sessions might be for audio, video, or IM communications, or they might be …

The growing importance of electronic commerce has resulted in the introduction of a variety
of different and incompatible payment systems. For business application developers, this …

Prerequisite for the success of new business models in the Internet, such as pay-per-view,
will be an efficient and interoperable electronic payment system. Many protocols and …

The SIP protocol has been showing for the last few years a strong acceptance by the market.
Through a large row of services, in particular VoIP calls and instant messaging (IM), SIP has …

The core of SEMPER consists of several blocks. Each block is a generic and extensible
framework for a particular service. This chapter describes the design of the Payment Block …

Session Initiation Protocol (SIP) was conceived in 1996 as a signaling protocol for inviting
users to multimedia conferences. With this development, the next big Internet revolution …

ABSTRACT The Session Initiation Protocol (SIP) is a signalling protocol developed to set up,
modify and tear down multimedia sessions such as voice and video calls, game sessions …

We present a framework for integrating electronic payments with applications. We call it the
Generic Electronic Payment Services (GEPS). There are five payment services identified in …