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: "Information Security of IPsec-based Mobile VPN: Authentication and Encryption Algorithms Performance"
  Abstract: Virtual Private Network (VPN) became one of the most reliable technologies to provide data security - protection, confidentiality, integrity, data origin authentication, replay protection and access control. Effectiveness of mobile VPN (MVPN) depends on multiple factors, including MVPN's selected architectural model, scheme model, topology model, levels of OSI model structure, authentication algorithms, encryption algorithms (ciphers), cipher operation modes, key management protocols, multiple parameters of security protocols, modes of operation and connection modes. This paper presents the outcomes of research project aimed at performance benchmarking of authentication and encryption algorithms for IPsec-based MVPNs.

Connected through hyperedge HE-1 (induced by source paper "Information security of mobile VPN: Conceptual models and design methodology"):
  with members:
    (none)

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