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: "a secure approach for caching contents in wireless ad hoc networks"
  Abstract: Caching aims to store data locally in some nodes within the network to be able to retrieve the contents in shorter time periods. However, caching in the network did not always consider secure storage (due to the compromise between time performance and security). In this paper, a novel decentralized secure coded caching approach is proposed. In this solution, nodes only transmit coded files to avoid eavesdropper wiretapping and protect the user contents. In this technique random vectors are used to combine the contents using XOR operation. We modeled the proposed coded caching scheme by a Shannon cipher system to show that coded caching achieves asymptotic perfect secrecy. The proposed coded caching scheme significantly simplifies the routing protocol in cached networks while it reduces over-caching and achieves a higher throughput capacity compared to uncoded caching in reactive routing. It is shown that with the proposed coded caching scheme any content can be retrieved by selecting a random path while achieving asymptotic optimum solution. We have also studied the cache hit probability and shown that the coded cache hit probability is significantly higher than uncoded caching. A secure caching update algorithm is also presented.

Connected through hyperedge HE-1 (induced by source paper "edge cache assisted secure low latency millimeter wave transmission"):
  with members:
    - "securing downlink massive mimo noma networks with artificial noise"
    - "hybrid precoder design for cache enabled millimeter wave radio access networks"
    - "secure and energy efficient transmissions in cache enabled heterogeneous cellular networks performance analysis and optimization"
    - "two level transmission scheme for cache enabled fog radio access networks"
    - "optimized base station cache allocation for cloud radio access network with multicast backhaul"
    - "exploiting physical layer security for multiuser multicarrier computation offloading"
    - "content placement in cache enabled sub 6 ghz and millimeter wave multi antenna dense small cell networks"
    - "random caching based cooperative transmission in heterogeneous wireless networks"

Connected through hyperedge HE-2 (induced by source paper "secrecy capacity memory tradeoff of erasure broadcast channels"):
  with members:
    - "secure broadcasting using independent secret keys"
    - "benefits of cache assignment on degraded broadcast channels"
    - "cache aided content delivery over erasure broadcast channels"
    - "cache enabled physical layer security for video streaming in backhaul limited cellular networks"
    - "noisy broadcast networks with receiver caching"
    - "speeding up future video distribution via channel aware caching aided coded multicast"
    - "on edge caching with secrecy constraints"
    - "fundamental limits of secretive coded caching"

Connected through hyperedge HE-3 (induced by source paper "low complexity secure code lcsc design for big data in cloud storage systems"):
  with members:
    - "secure and private cloud storage systems with random linear fountain codes"
    - "cloud based deep learning of big eeg data for epileptic seizure prediction"
    - "multihop caching aided coded multicasting for the next generation of cellular networks"
    - "secure repairable fountain codes"
    - "throughput analysis of decentralized coded content caching in cellular networks"
    - "capacity of cellular networks with femtocache"
    - "optimal locally repairable and secure codes for distributed storage systems"
    - "weakly secure regenerating codes for distributed storage"

Connected through hyperedge HE-4 (induced by source paper "individual security and network design with malicious nodes"):
  with members:
    - "strategic network formation with attack and immunization"
    - "multidefender security games"
    - "interdependent defense games modeling interdependent security under deliberate attacks"
    - "a local mean field analysis of security investments in networks"

Connected through hyperedge HE-5 (induced by source paper "secure and private cloud storage systems with random linear fountain codes"):
  with members:
    - "private information retrieval from mds coded data in distributed storage systems"
    - "cloud based deep learning of big eeg data for epileptic seizure prediction"
    - "multihop caching aided coded multicasting for the next generation of cellular networks"
    - "optimizing pilot overhead for ultra reliable short packet transmission"
    - "secure repairable fountain codes"
    - "distributed vector estimation for power and bandwidth constrained wireless sensor networks"
    - "throughput analysis of decentralized coded content caching in cellular networks"
    - "capacity of cellular networks with femtocache"

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.IT(Information Theory)