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: "secrecy degrees of freedom of mimo broadcast channels with delayed csit"
  Abstract: The degrees of freedom (DoF) of the two-user Gaussian multiple-input and multiple-output (MIMO) broadcast channel with confidential message (BCC) is studied under the assumption that delayed channel state information (CSI) is available at the transmitter. We characterize the optimal secrecy DoF (SDoF) region and show that it can be achieved by a simple artificial noise alignment (ANA) scheme. The proposed scheme sends the confidential messages superposed with the artificial noise over several time slots. Exploiting delayed CSI, the transmitter aligns the signal in such a way that the useful message can be extracted at the intended receiver but is completely drowned by the artificial noise at the unintended receiver. The proposed scheme can be interpreted as a non-trivial extension of Maddah-Ali Tse (MAT) scheme and enables us to quantify the resource overhead, or equivalently the DoF loss, to be paid for the secrecy communications.

Connected through hyperedge HE-1 (induced by source paper "achievable dof regions of three user mimo broadcast channel with delayed csit"):
  with members:
    - "on sdof of multi receiver wiretap channel with alternating csit"
    - "on the degrees of freedom of the 3 user miso broadcast channel with hybrid csit"
    - "on the degrees of freedom of k user siso interference and x channels with delayed csit"
    - "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    - "optimal use of current and outdated channel state information degrees of freedom of the miso bc with mixed csit"
    - "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"

Connected through hyperedge HE-2 (induced by source paper "secrecy capacity of colored gaussian noise channels with feedback"):
  with members:
    - "multiple access wiretap channel with noiseless feedback"
    - "an improved feedback coding scheme for the wire tap channel"
    - "control approach to computing the feedback capacity for stationary finite dimensional gaussian channels"
    - "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"

Connected through hyperedge HE-3 (induced by source paper "the wiretapped diamond relay channel"):
  with members:
    - "secure degrees of freedom of one hop wireless networks with no eavesdropper csit"
    - "capacity bounds for diamond networks with an orthogonal broadcast channel"
    - "secure degrees of freedom of the gaussian diamond wiretap channel"
    - "secure degrees of freedom of one hop wireless networks"
    - "real interference alignment exploiting the potential of single antenna systems"
    - "aligned image sets under channel uncertainty settling a conjecture by lapidoth shamai and wigger on the collapse of degrees of freedom under finite precision csit"
    - "secure degrees of freedom of the gaussian wiretap channel with helpers and no eavesdropper csi blind cooperative jamming"
    - "achievability proof via output statistics of random binning"

Connected through hyperedge HE-4 (induced by source paper "secrecy in mimo networks with no eavesdropper csit"):
  with members:
    - "secure degrees of freedom of one hop wireless networks with no eavesdropper csit"
    - "secure degrees of freedom of the multiple access wiretap channel with multiple antennas"
    - "secure degrees of freedom for the mimo wire tap channel with a multi antenna cooperative jammer"
    - "secure degrees of freedom of one hop wireless networks"
    - "feasibility of interference alignment for the mimo interference channel"
    - "blind mimome wiretap channel with delayed csit"
    - "mimo broadcast channel with an unknown eavesdropper secrecy degrees of freedom"
    - "secure degrees of freedom of the gaussian wiretap channel with helpers and no eavesdropper csi blind cooperative jamming"

Connected through hyperedge HE-5 (induced by source paper "achieving full dof in heterogeneous parallel broadcast channels with outdated csit"):
  with members:
    - "capacity results for binary fading interference channels with delayed csit"
    - "on the vector broadcast channel with alternating csit a topological perspective"
    - "the degrees of freedom region of temporally correlated mimo networks with delayed csit"
    - "symmetric two user mimo bc and ic with evolving feedback"
    - "degrees of freedom of time correlated miso broadcast channel with delayed csit"
    - "on the fundamental feedback vs performance tradeoff over the miso bc with imperfect and delayed csit"
    - "optimal use of current and outdated channel state information degrees of freedom of the miso bc with mixed csit"
    - "the degrees of freedom regions of two user and certain three user mimo broadcast channels with delayed csit"

Connected through hyperedge HE-6 (induced by source paper "secure degrees of freedom region of the two user miso broadcast channel with alternating csit"):
  with members:
    - "secure degrees of freedom of wireless x networks using artificial noise alignment"
    - "aligned image sets under channel uncertainty settling a conjecture by lapidoth shamai and wigger on the collapse of degrees of freedom under finite precision csit"
    - "on the degrees of freedom of the 3 user miso broadcast channel with hybrid csit"
    - "degrees of freedom region of the mimo interference channel with output feedback and delayed csit"
    - "dof analysis of the k user miso broadcast channel with alternating csit"
    - "on the dof region of the k user miso broadcast channel with hybrid csit"
    - "linear degrees of freedom of the mimo x channel with delayed csit"
    - "secure degrees of freedom of mimo x channels with output feedback and delayed csit"

Connected through hyperedge HE-7 (induced by source paper "secure degrees of freedom of wireless x networks using artificial noise alignment"):
  with members:
    - "secure degrees of freedom of one hop wireless networks"
    - "multiaccess channel with partially cooperating encoders and security constraints"
    - "secure degrees of freedom of k user gaussian interference channels a unified view"
    - "secure degrees of freedom of mimo x channels with output feedback and delayed csit"
    - "on x channels with feedback and delayed csi"
    - "secure communication over parallel relay channel"
    - "on achievable degrees of freedom for mimo x channels"
    - "interference alignment for secrecy"

Connected through hyperedge HE-8 (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"

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)