Donal O'Mahony is a senior lecturer in computer science at Trinity College in Dublin, Ireland, and the head of a research group specializing in networking, telecommunications, and data security. He also has consulted extensively for private industry and government. Dr. O'Mahony holds a Ph.D. in computer science from Trinity College. Michael Peirce is a research student at Trinity College, where he recently received his Ph.D. in computer science on the topic of multi-party micropayments for mobile communications. Hitesh Tewari is a lecturer in computer science at Trinity College and works as part of the networks and telecommunications research group on projects in network security and mobile communications.

• Preface. Motivation for Electronic Payment. Characteristics of Current Payment Systems - Cash Payments. Payment Through Banks. Using Payment Cards. Consumer Preferences in Payment Systems. Regulatory Framework. Cryptographic Techniques - Encryption and Decryption. Symmetric Encryption. AES Message Digesting or Hashing. Kerberos. Asymmetric or Public Key Encryption. Digital Signatures and Enveloping. RSA. Elliptic Curve Cryptography (ECC). Public Key Infrastructure (PKI) Transport of Security Information. Dual Signatures. Nonces. Blind Signatures. Chip Cards/Smart Cards. Summary. Credit Card Based Systems - Mail order/Telephone Order (MOTO) Transactions. Un-Secured Network Payments. Credit Card Aggregation. The Secure Socket Layer (SSL). i-Key Protocol (iKP). Secure Electronic Transactions (SET). Server Side Wallets. Account Transfers and Electronic Checks - Payment Transfer between Centralized Accounts. FSTC Electronic Check Project. NetBill. NetCheque. Summary. Electronic Cash Payment Systems - Ecash. Project CAFE. NetCash. CyberCoin. Stored Value Card Schemes. Remarks. Micropayment Systems - Millicent. Subscrip. PayWord. iKP Micropayment Protocol. X Hash Chain Trees. Micromint. Probability-Based Micropayments. Jalda. IBM Micropayments ( Mini-Pay). Banner Advertising. Micropayments Summary and Analysis. Mobile Commerce - What is M-Commerce. Billing through Mobile Operator. Mobile Payment Systems. Mobile Commerce Forums. M-Commerce Efforts for Existing Electronic Payment Systems. Payment Systems - Prospects for the Future.