To enhance believability of virtual agents, this paper presents an agent-based modelling approach for decision making, which integrates rational reasoning based on means-end analysis with personal psychological and biological aspects. The agent model developed is a combination of a BDI-model and a utility-based decision model in the context of specific desires and beliefs. The approach is illus...

We propose a tracing scheme of e-cash which has not only fair tracing ability but also lower computational complexity for comparisons. Many other protocols allow optimistic fair tracing which means that illegal tracing can be found after tracing and depositing in bank. But in this scheme, illegal tracing done by bank alone is impossible. We propose a marking mechanism based on a variant of an O...

By introducing a new e-commerce paradigm that of disposable anonymous accounts we are able to reduce storage requirements, while protecting against strong attacks on the system, and keeping computational requirements low. Our proposed scheme reduces storage costs of payers and merchants to the lowest theoretically possible, offers users computational (but not revocable) privacy, and protects ag...