CEP Support for Detection of Application Layer Attacks

Application Layer attacks are continuously targeted by new techniques of distributed denial of service attacks (DDoS) causing service disruption and considerable financial damage. While some of the DDoS attacks exploit sof tware vulnerabilities, most take advantage of the openness of the Internet and its ability to deliver packets of data from nearly any source to any destination. The aim of the research work is an overview of detection of application layer attacks for the support of Cardinality Estimation Problem (CEP) to propose new solutions, which take advantage of early detection of attacks.