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 secrecy degress of freedom of the multi antenna block fading wiretap channels"
  Abstract: We consider the multi-antenna wiretap channel in which the transmitter wishes to send a confidential message to its receiver while keeping it secret to the eavesdropper. It has been known that the secrecy capacity of such a channel does not increase with signal-to-noise ratio when the transmitter has no channel state information (CSI) under mild conditions. Motivated by Jafar's robust interference alignment technique, we study the so-called staggered multi-antenna block-fading wiretap channel where the legitimate receiver and the eavesdropper have different temporal correlation structures. Assuming no CSI at transmitter, we characterize lower and upper bounds on the secrecy degrees of freedom (s.d.o.f.) of the channel at hand. Our results show that a positive s.d.o.f. can be ensured whenever two receivers experience different fading variation. Remarkably, very simple linear precoding schemes provide the optimal s.d.o.f. in some cases of interest.

Connected through hyperedge HE-1 (induced by source paper "secrecy degrees of freedom of mimo broadcast channels with delayed csit"):
  with members:
    - "on the degrees of freedom of k user siso interference and x channels with delayed csit"
    - "the degrees of freedom region and interference alignment for the mimo interference channel with delayed csi"
    - "the degrees of freedom regions of two user and certain three user mimo broadcast channels with delayed csit"
    - "completely stale transmitter channel state information is still very useful"
    - "retrospective interference alignment"
    - "on the compound mimo broadcast channels with confidential messages"
    - "discrete memoryless interference and broadcast channels with confidential messages secrecy rate regions"
    - "the secrecy capacity of the mimo wiretap channel"

Connected through hyperedge HE-2 (induced by source paper "on the secrecy degrees of freedom of multi antenna wiretap channels with delayed csit"):
  with members:
    - "the degrees of freedom region and interference alignment for the mimo interference channel with delayed csi"
    - "the degrees of freedom regions of two user and certain three user mimo broadcast channels with delayed csit"
    - "retrospective interference alignment"
    - "interference alignment for the multi antenna compound wiretap channel"
    - "on the compound mimo broadcast channels with confidential messages"

Connected through hyperedge HE-3 (induced by source paper "distributed storage codes meet multiple access wiretap channels"):
  with members:
    - "the gaussian many to one interference channel with confidential messages"
    - "distributed data storage with minimum storage regenerating codes exact and functional repair are asymptotically equally efficient"
    - "interference alignment as a rank constrained rank minimization"
    - "interference alignment for the multi antenna compound wiretap channel"
    - "on the existence of optimal exact repair mds codes for distributed storage"
    - "on the secure degrees of freedom of the multiple access channel"
    - "a survey on network codes for distributed storage"
    - "searching for minimum storage regenerating codes"

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)