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: "cloud security challenges investigating policies standards and guidelines in a fortune 500 organization"
  Abstract: Cloud computing is quickly becoming pervasive in today's globally integrated networks. The cloud offers organizations opportunities to potentially deploy software and data solutions that are accessible through numerous mechanisms, in a multitude of settings, at a reduced cost with increased reliability and scalability. The increasingly pervasive and ubiquitous nature of the cloud creates an environment that is potentially conducive to security risks. While previous discussions have focused on security and privacy issues in the cloud from the end-users perspective, minimal empirical research has been conducted from the perspective of a corporate environment case study. This paper presents the results of an initial case study identifying real-world information security documentation issues for a Global Fortune 500 organization, should the organization decide to implement cloud computing services in the future. The paper demonstrates the importance of auditing policies, standards and guidelines applicable to cloud computing environments along with highlighting potential corporate concerns. The results from this case study has revealed that from the 1123 'relevant' statements found in the organization's security documentation, 175 statements were considered to be 'inadequate' for cloud computing. Furthermore, the paper provides a foundation for future analysis and research regarding implementation concerns for corporate cloud computing applications and services

Connected through hyperedge HE-1 (induced by source paper "medical cyber physical systems development a forensics driven approach"):
  with members:
    - "security incident recognition and reporting sirr an industrial perspective"
    - "are you ready towards the engineering of forensic ready systems"
    - "attack graph threat modeling assessment of ambulatory medical devices"
    - "honeypots for employee information security awareness and education training a conceptual easy training model"
    - "towards adaptive compliance"
    - "investigating the impact of global positioning system evidence"
    - "security incident response criteria a practitioner s perspective"
    - "rethinking security incident response the integration of agile principles"

Connected through hyperedge HE-2 (induced by source paper "are you ready towards the engineering of forensic ready systems"):
  with members:
    - "towards adaptive compliance"
    - "security incident response criteria a practitioner s perspective"
    - "rethinking security incident response the integration of agile principles"

Connected through hyperedge HE-3 (induced by source paper "recovering residual forensic data from smartphone interactions with cloud storage providers"):
  with members:
    - "digital forensic investigation of cloud storage services"
    - "emerging security challenges of cloud virtual infrastructure"
    - "identifying user behavior from residual data in cloud based synchronized apps"
    - "using smartphones as a proxy for forensic evidence contained in cloud storage services"
    - "calm before the storm the challenges of cloud computing in digital forensics"

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.CR(Cryptography and Security)