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 secure transmission over parallel relay eavesdropper channel"
  Abstract: We study a four terminal parallel relay-eavesdropper channel which consists of multiple independent relay-eavesdropper channels as subchannels. For the discrete memoryless case, we establish inner and outer bounds on the rate-equivocation region. For each subchannel, secure transmission is obtained through one of the two coding schemes at the relay: decoding-and-forwarding the source message or confusing the eavesdropper through noise injection. The inner bound allows relay mode selection. For the Gaussian model we establish lower and upper bounds on the perfect secrecy rate. We show that the bounds meet in some special cases, including when the relay does not hear the source. We illustrate the analytical results through some numerical examples.

Connected through hyperedge HE-1 (induced by source paper "on sdof of multi receiver wiretap channel with alternating csit"):
  with members:
    - "on miso broadcast channel with alternating csit and secrecy constraints"
    - "secure degrees of freedom region of the two user miso broadcast channel with alternating csit"
    - "multiaccess channel with partially cooperating encoders and security constraints"
    - "new results on multiple input multiple output broadcast channels with confidential messages"
    - "secure degrees of freedom of mimo x channels with output feedback and delayed csit"
    - "degrees of freedom of time correlated miso broadcast channel with delayed csit"
    - "optimal use of current and outdated channel state information degrees of freedom of the miso bc with mixed csit"
    - "secure communication over parallel relay channel"

Connected through hyperedge HE-2 (induced by source paper "interplay between delayed csit and network topology for secure miso bc"):
  with members:
    - "topological interference management through index coding"
    - "new results on multiple input multiple output broadcast channels with confidential messages"
    - "secure degrees of freedom of mimo x channels with output feedback and delayed csit"
    - "secure communication over parallel relay channel"
    - "interference alignment for secrecy"
    - "interference alignment for the mimo interference channel with delayed local csit"
    - "secrecy degrees of freedom of mimo broadcast channels with delayed csit"
    - "completely stale transmitter channel state information is still very useful"

Connected through hyperedge HE-3 (induced by source paper "on miso broadcast channel with alternating csit and secrecy constraints"):
  with members:
    - "multiaccess channel with partially cooperating encoders and security constraints"
    - "new results on multiple input multiple output broadcast channels with confidential messages"
    - "secure degrees of freedom of mimo x channels with output feedback and delayed csit"
    - "degrees of freedom of time correlated miso broadcast channel with delayed csit"
    - "optimal use of current and outdated channel state information degrees of freedom of the miso bc with mixed csit"
    - "secure communication over parallel relay channel"
    - "interference alignment for the mimo interference channel with delayed local csit"
    - "secrecy degrees of freedom of mimo broadcast channels with delayed csit"

Connected through hyperedge HE-4 (induced by source paper "secure degrees of freedom of mimo x channels with output feedback and delayed csit"):
  with members:
    - "on the degrees of freedom of k user siso interference and x channels with delayed csit"
    - "degrees of freedom region of the mimo interference channel with output feedback and delayed csit"
    - "topological interference management with alternating connectivity"
    - "multiaccess channel with partially cooperating encoders and security constraints"
    - "new results on multiple input multiple output broadcast channels with confidential messages"
    - "on x channels with feedback and delayed csi"
    - "secure communication over parallel relay channel"
    - "index coding an interference alignment perspective"

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)