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: "on the performance of secure full duplex relaying under composite fading channels"
  Abstract: We assume a full-duplex (FD) cooperative network subject to hostile attacks and undergoing composite fading channels. We focus on two scenarios: a) the transmitter has full CSI, for which we derive closed-form expressions for the average secrecy rate; and b) the transmitter only knows the CSI of the legitimate nodes, for which we obtain closed-form expressions for the secrecy outage probability. We show that secure FD relaying is feasible, even under strong self-interference and in the presence of sophisticated multiple antenna eavesdropper.

Connected through hyperedge HE-1 (induced by source paper "improving secrecy with nearly collinear main and wiretap channels via a cooperative jamming relay"):
  with members:
    - "on cooperative relaying schemes for wireless physical layer security"
    - "cooperative jamming for secure communications in mimo relay networks"
    - "cooperation with an untrusted relay a secrecy perspective"

Connected through hyperedge HE-2 (induced by source paper "throughput maximization in multi hop wireless networks under secrecy constraint"):
  with members:
    - "maximizing the link throughput between smart meters and aggregators as secondary users under power and outage constraints"
    - "on the secrecy of interference limited networks under composite fading channels"
    - "enhanced transmit antenna selection scheme for secure throughput maximization without csi at the transmitter and its applications on smart grids"
    - "improving physical layer security in wireless communications using diversity techniques"
    - "principles of physical layer security in multiuser wireless networks a survey"
    - "five disruptive technology directions for 5g"
    - "an overview of the transmission capacity of wireless networks"
    - "on the throughput of secure hybrid arq protocols for gaussian block fading channels"

Connected through hyperedge HE-3 (induced by source paper "enhanced transmit antenna selection scheme for secure throughput maximization without csi at the transmitter and its applications on smart grids"):
  with members:
    - "maximizing the link throughput between smart meters and aggregators as secondary users under power and outage constraints"
    - "rethinking the secrecy outage formulation a secure transmission design perspective"
    - "on the throughput of secure hybrid arq protocols for gaussian block fading channels"

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)