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 and data protection by design from policy to engineering"
  Abstract: Privacy and data protection constitute core values of individuals and of democratic societies. There have been decades of debate on how those values -and legal obligations- can be embedded into systems, preferably from the very beginning of the design process. #R##N#One important element in this endeavour are technical mechanisms, known as privacy-enhancing technologies (PETs). Their effectiveness has been demonstrated by researchers and in pilot implementations. However, apart from a few exceptions, e.g., encryption became widely used, PETs have not become a standard and widely used component in system design. Furthermore, for unfolding their full benefit for privacy and data protection, PETs need to be rooted in a data governance strategy to be applied in practice. #R##N#This report contributes to bridging the gap between the legal framework and the available technological implementation measures by providing an inventory of existing approaches, privacy design strategies, and technical building blocks of various degrees of maturity from research and development. Starting from the privacy principles of the legislation, important elements are presented as a first step towards a design process for privacy-friendly systems and services. The report sketches a method to map legal obligations to design strategies, which allow the system designer to select appropriate techniques for implementing the identified privacy requirements. Furthermore, the report reflects limitations of the approach. It concludes with recommendations on how to overcome and mitigate these limits.

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 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 "data querying and access control for secure multiparty computation"):
  with members:
    - "a management framework for secure multiparty computation in dynamic environments"
    - "a performance and resource consumption assessment of secret sharing based secure multiparty computation"
    - "leveraging secure multiparty computation in the internet of things"

Connected through hyperedge HE-3 (induced by source paper "realising the right to data portability for the domestic internet of things"):
  with members:
    - "internet of things an overview"
    - "human data interaction the human face of the data driven society"

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"
    - "verifying security policies using host attributes"
    - "privacy design strategies"

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 design strategies"
    - "agile software development methods review and analysis"

Connected through hyperedge HE-6 (induced by source paper "utility preserving differentially private data releases via individual ranking microaggregation"):
  with members:
    - "differentially private grids for geospatial data"
    - "a learning theory approach to non interactive database privacy"
    - "differentially private spatial decompositions"
    - "a simple and practical algorithm for differentially private data release"
    - "differential privacy via wavelet transforms"
    - "boosting the accuracy of differentially private histograms through consistency"

Connected through hyperedge HE-7 (induced by source paper "privacy preserving schemes for ad hoc social networks a survey"):
  with members:
    - "technical privacy metrics a systematic survey"
    - "human behaviour as an aspect of cyber security assurance"
    - "a novel measure of edge centrality in social networks"

Connected through hyperedge HE-8 (induced by source paper "going digital a survey on digitalization and large scale data analytics in healthcare"):
  with members:
    - "predicting clinical events by combining static and dynamic information using recurrent neural networks"
    - "towards a new science of a clinical data intelligence"

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)