Electronic payment is the economic backbone of all e-commerce transactions. This book covers the major subjects related to e-payment such as, for example, public key infrastructure, smart cards, payment agents, digital cash, SET protocols, and micro-payment. Its first part covers the infrastructure for secure e-payment over the Internet, whereas in the second part a variety of e-payment methods and systems are described. This edited volume offers a well-written and sound technical overview of the state of the art in e-payment for e-business developers, graduate students, and consultants. It is also ideally suited for classes and training courses in e-commerce or e-payment.