human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "secure regularized zero forcing for multiuser mimome channels"):
  Abstract: This paper proposes a new linear precoding scheme for downlink transmission in MIMOME channels, referred to as secure regularized zero forcing. The scheme modifies regularized zero forcing precoding, such that the beamformers further suppress the information leakage towards the eavesdroppers. The proposed scheme is characterized in the large-system limit, and a closed-form expression for the achievable ergodic secrecy rate per user is derived. Numerical investigations demonstrate high robustness against the quality of eavesdroppers' channel.

Includes members:
  Member "on robustness of massive mimo systems against passive eavesdropping under antenna selection":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "robustness of low complexity massive mimo architectures against passive eavesdropping")
  Member "glse precoders for massive mimo systems analysis and applications":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "robustness of low complexity massive mimo architectures against passive eavesdropping")
  Member "nonlinear precoders for massive mimo systems with general constraints":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "joint user selection and precoding in multiuser mimo systems via group lasso")
  Member "asymptotics of nonlinear lse precoders with applications to transmit antenna selection":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "robustness of low complexity massive mimo architectures against passive eavesdropping")
  Member "physical layer security for massive mimo an overview on passive eavesdropping and active attacks":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "downlink secrecy rate of one bit massive mimo system with active eavesdropping")
  Member "applications of large random matrices in communications engineering":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "glse precoders for massive mimo systems analysis and applications")
  Member "linear precoding for broadcast channels with confidential messages under transmit side channel correlation":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "cell edge aware precoding for downlink massive mimo cellular networks")
  Member "large system analysis of linear precoding in miso broadcast channels with confidential messages":
    also connected through other hyperedges:
      - Hyperedge HE-8 (induced by source paper "enhanced multiuser superposition transmission through structured modulation")

Question: Please tell me which class the source paper 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)