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 study on scalability of services and privacy issues in cloud computing"
  Abstract: Cloud Computing is rapidly emerging and the new development in Information Technology. There are many patterns, or categories, in the world of cloud computing that are needed for the enterprise architecture. Some of the categories of services are storage, database, information, process, application, platform, integration, security, privacy, management/governance, testing, and infrastructure. Scalability is one of the important features applied on any of the services. The existing analysis specially focuses on Architectural and policy Implications without exploring the data privacy issues. In this paper, the application scalability and data privacy initiatives on various services in cloud environments are presented, with an overview of the trends they follow.

Connected through hyperedge HE-1 (induced by source paper "Cloud control with distributed rate limiting"):
  with members:
    - "A DoS-limiting network architecture"
    - "Network-Wide Heavy Hitter Detection with Commodity Switches"

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