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: "rethinking the secrecy outage formulation a secure transmission design perspective"
  Abstract: This letter studies information-theoretic security without knowing the eavesdropper's channel fading state. We present an alternative secrecy outage formulation to measure the probability that message transmissions fail to achieve perfect secrecy. Using this formulation, we design two transmission schemes that satisfy the given security requirement while achieving good throughput performance.

Connected through hyperedge HE-1 (induced by source paper "secrecy transmission in large scale uav enabled wireless networks"):
  with members:
    - "a survey of optimization approaches for wireless physical layer security"
    - "exploiting noma oma for multi uav communications in large scale networks"
    - "exploiting noma for uav communications in large scale cellular networks"
    - "capacity characterization of uav enabled two user broadcast channel"
    - "securing uav communications via joint trajectory and power control"
    - "cellular enabled uav communication a connectivity constrained trajectory optimization perspective"
    - "ultra reliable uav communication using altitude and cooperation diversity"
    - "physical layer security in cache enabled cooperative small cell networks against randomly distributed eavesdroppers"

Connected through hyperedge HE-2 (induced by source paper "energy efficient resource allocation for secure noma enabled mobile edge computing networks"):
  with members:
    - "securing downlink massive mimo noma networks with artificial noise"
    - "joint power and time allocation for noma mec offloading"
    - "improving anti eavesdropping ability without eavesdropper s csi a practical secure transmission design perspective"
    - "joint computation and communication cooperation for energy efficient mobile edge computing"
    - "exploiting physical layer security for multiuser multicarrier computation offloading"
    - "edge computing aware noma for 5g networks"
    - "impact of non orthogonal multiple access on the offloading of mobile edge computing"
    - "robust and secure resource allocation for full duplex miso multicarrier noma systems"

Connected through hyperedge HE-3 (induced by source paper "secrecy outage for wireless sensor networks"):
  with members:
    - "improving physical layer security in wireless communications using diversity techniques"
    - "intercept behavior analysis of industrial wireless sensor networks in the presence of eavesdropping attack"
    - "optimal relay selection for physical layer security in cooperative wireless networks"

Connected through hyperedge HE-4 (induced by source paper "on the beneficial role of a finite number of scatterers for wireless physical layer security"):
  with members:
    - "secrecy rate maximization for intelligent reflecting surface assisted multi antenna communications"
    - "physical layer security over fluctuating two ray fading channels"
    - "the fluctuating two ray fading model statistical characterization and performance analysis"

Connected through hyperedge HE-5 (induced by source paper "link selection for secure cooperative networks with buffer aided relaying"):
  with members:
    - "physical layer security of a buffer aided full duplex relaying system"
    - "simultaneous bidirectional link selection in full duplex mimo systems"
    - "effect of spatial interference correlation on the performance of maximum ratio combining"
    - "principles of physical layer security in multiuser wireless networks a survey"
    - "buffer aided relaying with adaptive link selection"
    - "buffer aided relaying with adaptive link selection fixed and mixed rate transmission"
    - "relay placement for physical layer security a secure connection perspective"
    - "cooperative jamming for secure communications in mimo relay networks"

Connected through hyperedge HE-6 (induced by source paper "on secure transmission design an information leakage perspective"):
  with members:
    - "secrecy outage for wireless sensor networks"
    - "securing on body iot devices by exploiting creeping wave propagation"
    - "resonance based secure pairing for wearables"
    - "on secrecy metrics for physical layer security over quasi static fading channels"
    - "secure on off transmission design with channel estimation errors"

Connected through hyperedge HE-7 (induced by source paper "boundaries as an enhancement technique for physical layer security"):
  with members:
    - "temporal correlation of interference and outage in mobile networks over one dimensional finite regions"
    - "stochastic geometry based comparison of secrecy enhancement techniques in d2d networks"
    - "temporal correlation of interference in bounded mobile ad hoc networks with blockage"
    - "distribution of cell size in bounded voronoi tesselations with application to secure local connectivity"
    - "device to device millimeter wave communications interference coverage rate and finite topologies"
    - "physical layer security in heterogeneous cellular networks"
    - "physical layer security in three tier wireless sensor networks a stochastic geometry approach"
    - "analyzing the impact of access point density on the performance of finite area networks"

Connected through hyperedge HE-8 (induced by source paper "boundaries can enhance physical layer security at high data rates"):
  with members:
    - "temporal correlation of interference and outage in mobile networks over one dimensional finite regions"
    - "physical layer security in wireless ad hoc networks under a hybrid full half duplex receiver deployment strategy"
    - "stochastic geometry based comparison of secrecy enhancement techniques in d2d networks"
    - "temporal correlation of interference in bounded mobile ad hoc networks with blockage"
    - "physical layer security in heterogeneous cellular networks"
    - "physical layer security in three tier wireless sensor networks a stochastic geometry approach"
    - "improving physical layer security in wireless communications using diversity techniques"
    - "analyzing the impact of access point density on the performance of finite area networks"

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)