Transaction-Based Anomaly Detection

The increasing complexity of both tele and data communication networks yields new demands concerning network security. Especially the task of detecting, repulsing and preventing abuse by in- and outsiders is becoming more and more difficult. This paper deals with a new technique that appears to be suitable for solving these issues, i.e. anomaly detection based on the specification of transactions. The traditional transaction and serialization concepts are discussed, and a new model of anomaly detection, based on the concept of transactions, is introduced. Applying this model to known attacks gives a first insight concerning the feasibility of our approach.