Titlebook: E-Commerce and Web Technologies; 4th International Co Kurt Bauknecht,A Min Tjoa,Gerald Quirchmayr Conference proceedings 2003 Springer-Verl

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ead of modifying web services engine. It also supports extensibility since it has been developed based on international standards such as WS-Security, XKMS, XML Encryption, and XML Signature specifications. The proposed solution provides clients and servers in the business to business environments with confidence and security.

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h the GSM subscriber identity in such a way that without a mobile station, in particular the SIM, and the corresponding debit/credit card, an unscrupulous user will find it difficult to make a fraudulent payment at the expense of the legitimate cardholder. This is achieved in such a way that no management overhead is imposed on the user.

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er can include several business rules and purchasing policies as side constraints in the optimization problem to evaluate the winning bids. We propose the use of goal programming techniques to solve the bid evaluation problem.

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total revenue. This variant of a Dutch auction guarantees that the sum of the face value of all used coupons will be less than (or equal to) the increase in the revenue caused by their use. As a result the realized revenue will be higher than the revenue received in a typical Dutch auction with the same settings.

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