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 by design framework for assessing internet of things applications and platforms"
  Abstract: The Internet of Things (IoT) systems are designed and developed either as standalone applications from the ground-up or with the help of IoT middleware platforms. They are designed to support different kinds of scenarios, such as smart homes and smart cities. Thus far, privacy concerns have not been explicitly considered by IoT applications and middleware platforms. This is partly due to the lack of systematic methods for designing privacy that can guide the software development process in IoT. In this paper, we propose a set of guidelines, a privacy-by-design framework, that can be used to assess privacy capabilities and gaps of existing IoT applications as well as middleware platforms. We have evaluated two open source IoT middleware platforms, namely OpenIoT and Eclipse SmartHome, to demonstrate how our framework can be used in this way.

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"
    - "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"
    - "privacy design strategies"

Connected through hyperedge HE-2 (induced by source paper "user perceptions of smart home iot privacy"):
  with members:
    - "discovering smart home internet of things privacy norms using contextual integrity"
    - "a smart home is no castle privacy vulnerabilities of encrypted iot traffic"
    - "the perfect storm the privacy paradox and the internet of things"
    - "sabbath day home automation it s like mixing technology and religion"

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"
    - "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"
    - "privacy design strategies"

Connected through hyperedge HE-4 (induced by source paper "privacy guidelines for internet of things a cheat sheet"):
  with members:
    - "designing privacy aware internet of things 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)