This extensively updated, second edition offers the reader a current overview of the ways smart cards address the computer security issues of today's distributed applications. New discussions on multi-application operating systems, computer networks, and the Internet are included to keep the reader abreast of the very latest developments in this field. The book provides technical details on the newest protection mechanisms, features a discussion on the effects of recent attacks, and offers a clear methodology for solving unique security problems. From user authentication in remote payments, Internet transactions, and telephony, to fraud and counterfeit in card payments, to electronic ticketing, portability, and confidentiality, this comprehensive resource describes the major applications of smart cards. It explains how smart cards are particularly relevant to Internet-based applications, and to payment in the modern world through the use of cryptography, public key infrastructures, and biometrics.