Alexander W. Röhm

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Existing electronic markets in the open network Internet often show a lack of security and fairness. New forms of trading are just coming up and the variety of different market structures and digital goods we will probably see in the future is yet unthinkable. Therefore, an infrastructure for future electronic markets has to support the realization of(More)
Among other areas electronic commerce includes the fields of electronic markets and workflow management. Workflow management systems are usually used to specify and manage interand intra-organisational business processes. Although workflow management techniques are capable to specify and conduct at least parts of market transactions, these techniques are(More)
In this paper we characterize the different tasks mobile agents can perform for their users on electronic markets. These tasks imply various risks that have to be addressed by protection mechanisms, not only to protect the market servers from malicious agents, but also to prevent the mobile agents from malicious hosts. To achieve the latter is quite(More)
Electronic Markets as new mechanisms for co-ordinating allocation of goods, are supposed to reduce the trading immanent transaction costs, especially when the traded goods are digitally represented. A market with no transaction costs is theoretically the most efficient possible allocation mechanism. The US government has recently passed the Acid Rain Act,(More)
Mit dem Beginn der kommerziellen Nutzung des Internet hat Electronic Commerce eine neue Entwicklungsstufe erreicht. Der Einstieg in Electronic Commerce bringt durch sinkende Informationskosten und stärkere Integration der einzelnen Geschäftsschritte neue Möglichkeiten der effizienten Durchführung von Geschäften mit sich. Dem stehen jedoch neue Risiken(More)