human: Given a node-centered hypergraph: <hypergraph>, where nodes represent authors and hyperedges represent groups of authors who co-authored the same paper.

Details of the hypergraph:
Center node: "A DoS-limiting network architecture"
  Abstract: We present the design and evaluation of TVA, a network architecture that limits the impact of Denial of Service (DoS) floods from the outset. Our work builds on earlier work on capabilities in which senders obtain short-term authorizations from receivers that they stamp on their packets. We address the full range of possible attacks against communication between pairs of hosts, including spoofed packet floods, network and host bottlenecks, and router state exhaustion. We use simulation to show that attack traffic can only degrade legitimate traffic to a limited extent, significantly outperforming previously proposed DoS solutions. We use a modified Linux kernel implementation to argue that our design can run on gigabit links using only inexpensive off-the-shelf hardware. Our design is also suitable for transition into practice, providing incremental benefit for incremental deployment.

Connected through hyperedge HE-1 (induced by source paper "Cloud control with distributed rate limiting"):
  with members:
    - "Network-Wide Heavy Hitter Detection with Commodity Switches"
    - "A study on scalability of services and privacy issues in cloud computing"

Connected through hyperedge HE-2 (induced by source paper "Mitigating application-level denial of service attacks on Web servers: A client-transparent approach"):
  with members:
    - "Detection of HTTP flooding attacks in multiple scenarios"

Connected through hyperedge HE-3 (induced by source paper "Controlling high bandwidth aggregates in the network"):
  with members:
    - "The synchronization of periodic routing messages"
    - "Reliability and performance of tree-structured grid services"

Connected through hyperedge HE-4 (induced by source paper "SANE: a protection architecture for enterprise networks"):
  with members:
    - "Security of Software Defined Networks"

Question: Please tell me which research area the center author belongs to. The 4 classes are: Computer science, Mathematics, Engineering, Economics, Psychology, Business. Directly output the class name.

gpt: Computer science