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: "splitbox toward efficient private network function virtualization"
  Abstract: This paper presents SplitBox, a scalable system for privately processing network functions that are outsourced as software processes to the cloud. Specifically, providers processing the network functions do not learn the network policies instructing how the functions are to be processed. We first propose an abstract model of a generic network function based on match-action pairs, assuming that this is processed in a distributed manner by multiple honest-but-curious providers. Then, we introduce our SplitBox system for private network function virtualization and present a proof-of-concept implementation on FastClick -- an extension of the Click modular router -- using a firewall as a use case. Our experimental results show that SplitBox achieves a throughput of over 2 Gbps with 1 kB-sized packets on average, traversing up to 60 firewall rules.

Connected through hyperedge HE-1 (induced by source paper "nfv platform design a survey"):
  with members:
    - "network service orchestration a survey"
    - "snf serverless network functions"
    - "nfvactor a resilient nfv system using the distributed actor model"
    - "sonata service programming and orchestration for virtualized software networks"
    - "lightbox full stack protected stateful middlebox at lightning speed"
    - "correctness and performance for stateful chained network functions"
    - "network function virtualization state of the art and research challenges"

Connected through hyperedge HE-2 (induced by source paper "towards practical encrypted network traffic pattern matching for secure middleboxes"):
  with members:
    - "spectre attacks exploiting speculative execution"
    - "lightbox full stack protected stateful middlebox at lightning speed"

Connected through hyperedge HE-3 (induced by source paper "lightbox full stack protected stateful middlebox at lightning speed"):
  with members:
    - "deep fingerprinting undermining website fingerprinting defenses with deep learning"
    - "cachezoom how sgx amplifies the power of cache attacks"
    - "the dark side channel of mobile devices a survey on network traffic analysis"
    - "software grand exposure sgx cache attacks are practical"
    - "private processing of outsourced network functions feasibility and constructions"

Connected through hyperedge HE-4 (induced by source paper "sics secure in cloud service function chaining"):
  with members:
    - "private processing of outsourced network functions feasibility and constructions"

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)