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: "an improved feedback coding scheme for the wire tap channel"
  Abstract: Secure and reliable transmission over communication channels is first characterized by Wyner's wiretap channel (WTC) model. In recent years, the WTC with noiseless feedback (WTC-NF) attracts a lot attention, and it has been shown that the legal receiver's feedback enlarges the secrecy capacity of the WTC. Even so, the current feedback strategy for the WTC mainly focuses on generating key used for encrypting the transmitted message, and this strategy does not achieve the secrecy capacity of the WTC-NF. In this paper, a new coding strategy for the WTC-NF is presented. Besides used for generating key, the legal receiver's feedback of this new strategy is also used to produced a help information which helps the legal receiver to ameliorate his decoding performance. For the WTC-NF, the proposed new feedback strategy is shown to be better than the already existing one, and a binary example is given to further explain these results.

Connected through hyperedge HE-1 (induced by source paper "secrecy capacity of colored gaussian noise channels with feedback"):
  with members:
    - "multiple access wiretap channel with noiseless feedback"
    - "control approach to computing the feedback capacity for stationary finite dimensional gaussian channels"
    - "secrecy degrees of freedom of mimo broadcast channels with delayed csit"
    - "the wiretap channel with feedback encryption over the channel"
    - "secret communication with feedback"
    - "secrecy capacity of the wiretap channel with noisy feedback"
    - "feedback capacity of stationary gaussian 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)