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: "privacy design strategies"
  Abstract: In this paper we define the notion of a privacy design strategy. These strategies help IT architects to support privacy by design early in the software development life cycle, during concept development and analysis. Using current data protection legislation as point of departure we derive the following eight privacy design strategies: minimise, hide, separate, aggregate, inform, control, enforce, and demonstrate. The strategies also provide a useful classification of privacy design patterns and the underlying privacy enhancing technologies. We therefore believe that these privacy design strategies are not only useful when designing privacy friendly systems, but also helpful when evaluating the privacy impact of existing IT systems.

Connected through hyperedge HE-1 (induced by source paper "privacy in internet of things from principles to technologies"):
  with members:
    - "internet of things survey on security"
    - "privacy by design framework for assessing internet of things applications and platforms"
    - "on the feasibility of attribute based encryption on internet of things devices"
    - "privacy in the internet of things threats and challenges"
    - "privacy and data protection by design from policy to engineering"
    - "privacy by design in big data an overview of privacy enhancing technologies in the era of big data analytics"
    - "sensing as a service model for smart cities supported by internet of things"
    - "internet of things iot a vision architectural elements and future directions"

Connected through hyperedge HE-2 (induced by source paper "peepll privacy enhanced event pseudonymisation with limited linkability"):
  with members:
    - "health data in an open world"

Connected through hyperedge HE-3 (induced by source paper "designing privacy aware internet of things applications"):
  with members:
    - "privacy guidelines for internet of things a cheat sheet"
    - "privacy by design framework for assessing internet of things applications and platforms"
    - "the emerging internet of things marketplace from an industrial perspective a survey"
    - "a survey on internet of things from industrial market perspective"
    - "context aware computing for the internet of things a survey"
    - "internet of things iot a vision architectural elements and future directions"

Connected through hyperedge HE-4 (induced by source paper "privacy assessment using static taint analysis tool paper"):
  with members:
    - "demonstrating topos theorem prover based synthesis of secure network configurations"
    - "privacy and data protection by design from policy to engineering"
    - "verifying security policies using host attributes"

Connected through hyperedge HE-5 (induced by source paper "designing privacy for you a user centric approach for privacy"):
  with members:
    - "a trust domains taxonomy for securely sharing information a preliminary investigation"
    - "privacy and data protection by design from policy to engineering"
    - "agile software development methods review and analysis"

Connected through hyperedge HE-6 (induced by source paper "privacy by design framework for assessing internet of things applications and platforms"):
  with members:
    - "analytics as a service in a multi cloud environment through semantically enabled hierarchical data processing"
    - "energy efficient location and activity aware on demand mobile distributed sensing platform for sensing as a service in iot clouds"
    - "big data privacy in the internet of things era"
    - "the emerging internet of things marketplace from an industrial perspective a survey"
    - "iprivacy a distributed approach to privacy on the cloud"
    - "context aware computing for the internet of things a survey"

Connected through hyperedge HE-7 (induced by source paper "end to end privacy for open big data markets"):
  with members:
    - "the emerging internet of things marketplace from an industrial perspective a survey"
    - "context aware computing for the internet of things a survey"
    - "sensing as a service model for smart cities supported by internet of things"

Connected through hyperedge HE-8 (induced by source paper "privacy by design from technologies to architectures position paper"):
  with members:
    - "plug in privacy for smart metering billing"
    - "dealing with logical omniscience expressiveness and pragmatics"
    - "deductive algorithmic knowledge"

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)