"In this second edition of his highly acclaimed book, Wayner has added more information on the latest tools available for digital transactions, making this book a necessity for anyone planning on setting up shop over the Internet.". "This comprehensive guide to exchanging money over the Net includes detailed algorithms for producing and implementing monetary systems like digital checks, digital coupons, digital cashier's checks, and divisible cash. Several systems for creating secure credit cards transactions are described as well as the many commercial digital cash systems available today."--BOOK JACKET.