human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "enhancing infrastructure security in real estate"
  Abstract: As a result of the increased dependency on obtaining information and connecting each computer together for ease of access/communication, organizations risk being attacked and losing private information through breaches or insecure business activities. To help protect organizations and their assets, companies need to develop a strong understanding of the risks imposed on their company and the security solutions designed to prevent/minimize vulnerabilities. To reduce the impact threats have on a network, organizations need to: design a defense layer system that provides multiple instances of protection to prevent unauthorized access to core information, implement a strong network hardware/intrusion prevention system, and create all-inclusive network/security policies that detail user rules and company rights. In order to enhance the overall security of a basic infrastructure, this paper will provide a detailed look into gathering the organizational requirements, designing and implementing a secure physical network layout, and selecting the standards needed to prevent unauthorized access.

Connected through hyperedge HE-1 (induced by source paper "complete network security protection for sme s within limited resources"):
  with members:
    - "video surveillance in the cloud"
    - "non profit organizations need to address security for effective government contracting"
    - "information security synthesis in online universities"
    - "cloud computing avoids downfall of application service providers"
    - "security risks in mechanical engineering industries"
    - "it security plan for flight simulation program"
    - "it security issues within the video game industry"
    - "an overview of the security concerns in enterprise cloud computing"

Connected through hyperedge HE-2 (induced by source paper "healthcare it is your information at risk"):
  with members:
    - "video surveillance in the cloud"
    - "non profit organizations need to address security for effective government contracting"
    - "information security synthesis in online universities"
    - "cloud computing avoids downfall of application service providers"
    - "security risks in mechanical engineering industries"
    - "it security plan for flight simulation program"
    - "it security issues within the video game industry"
    - "an overview of the security concerns in enterprise cloud computing"

Connected through hyperedge HE-3 (induced by source paper "non profit organizations need to address security for effective government contracting"):
  with members:
    - "information security synthesis in online universities"
    - "cloud computing avoids downfall of application service providers"
    - "security risks in mechanical engineering industries"
    - "it security plan for flight simulation program"
    - "it security issues within the video game industry"
    - "an overview of the security concerns in enterprise cloud computing"
    - "information security plan for flight simulator applications"
    - "convergence of corporate and information security"

Connected through hyperedge HE-4 (induced by source paper "video surveillance in the cloud"):
  with members:
    - "information security synthesis in online universities"
    - "cloud computing avoids downfall of application service providers"
    - "security risks in mechanical engineering industries"
    - "it security plan for flight simulation program"
    - "it security issues within the video game industry"
    - "information security plan for flight simulator applications"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.CY(Computers and Society)