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: "multiple access relay wiretap channel"
  Abstract: In this paper, we investigate the effects of an additional trusted relay node on the secrecy of multiple-access wiretap channel (MAC-WT) by considering the model of multiple-access relay wiretap channel (MARC-WT). More specifically, first, we investigate the discrete memoryless MARC-WT. Three inner bounds [with respect to decode-and-forward (DF), noise-and-forward (NF), and compress-and-forward (CF) strategies] on the secrecy capacity region are provided. Second, we investigate the degraded discrete memoryless MARC-WT, and present an outer bound on the secrecy capacity region of this degraded model. Finally, we investigate the Gaussian MARC-WT, and find that the proposed relay strategies (DF, NF, CF strategies) help to enhance Tekin-Yener’s achievable secrecy rate region of the Gaussian MAC-WT.

Connected through hyperedge HE-1 (induced by source paper "feedback coding schemes for the broadcast channel with mutual secrecy requirement"):
  with members:
    - "secure broadcasting using independent secret keys"
    - "finite state markov wiretap channel with delayed feedback"
    - "wiretap channel with causal state information and secure rate limited feedback"
    - "discrete memoryless interference and broadcast channels with confidential messages secrecy rate regions"
    - "secrecy capacity of a class of broadcast channels with an eavesdropper"
    - "the secrecy rate region of the broadcast channel"
    - "source coding for a simple network with receiver side information"
    - "the gaussian multiple access wire tap channel"

Connected through hyperedge HE-2 (induced by source paper "achieving both positive secrecy rates of the users in two way wiretap channel by individual secrecy"):
  with members:
    - "weakly secure regenerating codes for distributed storage"
    - "strongly secure communications over the two way wiretap channel"
    - "the role of feedback in two way secure communications"
    - "discrete memoryless interference and broadcast channels with confidential messages secrecy rate regions"

Connected through hyperedge HE-3 (induced by source paper "finite state markov wiretap channel with delayed feedback"):
  with members:
    - "relay broadcast channel with confidential messages"
    - "multiaccess channel with partially cooperating encoders and security constraints"
    - "secret writing on dirty paper a deterministic view"
    - "interference assisted secret communication"
    - "on the capacity of memoryless finite state multiple access channels with asymmetric state information at the encoders"
    - "capacity bounds for broadcast channels with confidential messages"
    - "discrete memoryless interference and broadcast channels with confidential messages secrecy rate regions"
    - "secrecy in cooperative relay broadcast 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)