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 secure degrees of freedom in the k user gaussian interference channel"
  Abstract: This paper studies the K-user Gaussian interference channel with secrecy constraints. Two distinct network models, namely the interference channel with confidential messages and the one with an external eavesdropper, are analyzed. Using interference alignment along with secrecy pre-coding at each transmitter, it is shown that each user in the network can achieve non-zero secure degrees of freedoms (DoFs) in both scenarios. In particular, the proposed coding scheme achieves K-2/2K-2 secure DoFs for each user in the interference channel with confidential messages model, and K-2/2K secure DoFs in the case of an external eavesdropper. The fundamental difference between the two scenarios stems from the lack of channel state information (CSI) about the external eavesdropper. Remarkably, the results establish the positive impact of interference on the secrecy capacity of wireless networks.

Connected through hyperedge HE-1 (induced by source paper "friendly jamming in a mimo wiretap interference network a nonconvex game approach"):
  with members:
    - "joint power control in wiretap interference channels"
    - "physical layer security for massive mimo an overview on passive eavesdropping and active attacks"
    - "real and complex monotone communication games"
    - "joint sensing and power allocation in nonconvex cognitive radio games nash equilibria and distributed algorithms"
    - "on secrecy rate of the generalized artificial noise assisted secure beamforming for wiretap channels"
    - "secure transmission with multiple antennas ii the mimome wiretap channel"

Connected through hyperedge HE-2 (induced by source paper "joint power control in wiretap interference channels"):
  with members:
    - "secure degrees of freedom of one hop wireless networks"
    - "secrecy in the 2 user symmetric deterministic interference channel with transmitter cooperation"
    - "outage constrained robust secure transmission for miso wiretap channels"
    - "spectrum leasing via cooperation for enhanced physical layer secrecy"
    - "interference assisted secret communication"
    - "the gaussian many to one interference channel with confidential messages"
    - "cooperative secret communication with artificial noise in symmetric interference channel"
    - "on the relationship between the multi antenna secrecy communications and cognitive radio communications"

Connected through hyperedge HE-3 (induced by source paper "blind mimome wiretap channel with delayed csit"):
  with members:
    - "secure degrees of freedom region of the two user miso broadcast channel with alternating csit"
    - "secure degrees of freedom of one hop wireless networks"
    - "feasibility of interference alignment for the mimo interference channel"
    - "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"
    - "secure degrees of freedom of mimo x channels with output feedback and delayed csit"
    - "artificial noise alignment for secure multicast using multiple antennas"
    - "on the secrecy degrees of freedom of multi antenna wiretap channels with delayed csit"

Connected through hyperedge HE-4 (induced by source paper "multiuser diversity for secrecy communications using opportunistic jammer selection secure dof and jammer scaling law"):
  with members:
    - "on the achievable dof and user scaling law of opportunistic interference alignment in 3 transmitter mimo interference channels"
    - "random beamforming with heterogeneous users and selective feedback individual sum rate and individual scaling laws"
    - "multiuser diversity in interfering broadcast channels achievable degrees of freedom and user scaling law"
    - "interference alignment for secrecy"
    - "joint relay and jammer selection for secure two way relay networks"
    - "on the throughput cost of physical layer security in decentralized wireless networks"
    - "ergodic secret alignment"
    - "cooperative secret communication with artificial noise in symmetric interference channel"

Connected through hyperedge HE-5 (induced by source paper "mimo interference alignment over correlated channels with imperfect csi"):
  with members:
    - "cooperative algorithms for mimo interference channels"
    - "on feasibility of interference alignment in mimo interference networks"
    - "bit error rate is convex at high snr"
    - "on feasibility of interference alignment in mimo interference networks"
    - "the feasibility of interference alignment over measured mimo ofdm channels"
    - "on the achievability of interference alignment in the k user constant mimo interference channel"
    - "opportunistic interference alignment in mimo interference channels"
    - "approaching the capacity of wireless networks through distributed interference alignment"

Connected through hyperedge HE-6 (induced by source paper "robust beamforming for security in mimo wiretap channels with imperfect csi"):
  with members:
    - "interference assisted secret communication"
    - "the secrecy capacity of the mimo wiretap channel"

Connected through hyperedge HE-7 (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"
    - "on the secrecy degress of freedom of the multi antenna block fading wiretap channels"
    - "a survey on network codes for distributed storage"

Connected through hyperedge HE-8 (induced by source paper "on the secrecy degress of freedom of the multi antenna block fading wiretap channels"):
  with members:
    - "interference alignment for the multi antenna compound wiretap channel"
    - "on the secure dof of the single antenna mac"
    - "exploiting channel correlations simple interference alignment schemes with no csit"
    - "on the degrees of freedom of the compound mimo broadcast channels with finite states"
    - "on the compound mimo broadcast channels with confidential messages"
    - "on the degrees of freedom of finite state compound wireless networks settling a conjecture by weingarten et al"

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)