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: "Security, privacy and trust in Internet of Things"
  Abstract: Internet of Things (IoT) is characterized by heterogeneous technologies, which concur to the provisioning of innovative services in various application domains. In this scenario, the satisfaction of security and privacy requirements plays a fundamental role. Such requirements include data confidentiality and authentication, access control within the IoT network, privacy and trust among users and things, and the enforcement of security and privacy policies. Traditional security countermeasures cannot be directly applied to IoT technologies due to the different standards and communication stacks involved. Moreover, the high number of interconnected devices arises scalability issues; therefore a flexible infrastructure is needed able to deal with security threats in such a dynamic environment. In this survey we present the main research challenges and the existing solutions in the field of IoT security, identifying open issues, and suggesting some hints for future research.

Connected through hyperedge HE-1 (induced by source paper "Shielding IoT against Cyber-Attacks: An Event-Based Approach Using SIEM"):
  with members:
    (none)

Connected through hyperedge HE-2 (induced by source paper "Dynamic Policies in Internet of Things: Enforcement and Synchronization"):
  with members:
    - "Towards a Secure and Borderless Collaboration between Organizations: An Automated Enforcement Mechanism"

Connected through hyperedge HE-3 (induced by source paper "Trust and location based service in mobile social networks – A survey"):
  with members:
    - "Review: Certification-based trust models in mobile ad hoc networks: A survey and taxonomy"

Connected through hyperedge HE-4 (induced by source paper "A novel user authentication and key agreement scheme for heterogeneous ad hoc wireless sensor networks, based on the Internet of Things notion"):
  with members:
    - "BorderSense: Border patrol through advanced wireless sensor networks"
    - "A Review of Factors Influencing Customer Acceptance of Internet of Things Services"

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