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: "Trust and location based service in mobile social networks – A survey"
  Abstract: {}

Connected through hyperedge HE-1 (induced by source paper "Review: Certification-based trust models in mobile ad hoc networks: A survey and taxonomy"):
  with members:
    - "Self-securing ad hoc wireless networks"
    - "Certificate-Less On-Demand Public Key Management (CLPKM) for Self-organized MANETs"

Connected through hyperedge HE-2 (induced by source paper "Security, privacy and trust in Internet of Things"):
  with members:
    - "A novel user authentication and key agreement scheme for heterogeneous ad hoc wireless sensor networks, based on the Internet of Things notion"
    - "Dynamic Policies in Internet of Things: Enforcement and Synchronization"
    - "Shielding IoT against Cyber-Attacks: An Event-Based Approach Using SIEM"

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