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 "secrecy rate of distributed cooperative mimo in the presence of multi antenna eavesdropper"):
  Abstract: We propose and study the secrecy cooperative MIMO architecture to enable and to improve the secrecy transmissions between clusters of mobile devices in presence of a multi-antenna eavesdropper. The cooperative MIMO is formed by temporarily activating clusters of the nearby trusted devices, with each cluster being centrally coordinated by its corresponding cluster head. We assume that the transmitters apply a practical eigen-direction precoding scheme and that the eavesdropper has multiple possible locations in the proximity of the legitimate devices. We first obtain the expression of the secrecy rate, where the required ergodic mutual information between the transmit cluster and the eavesdropper is characterized by closed-form approximations. The proposed approximations are accurate, and are especially useful for the secrecy rate maximization in terms of the computational complexity. The secrecy rate maximization is then recast into the difference convex programming, which can be solved by an iterative outer approximation algorithm. Numerical results show that the achievable secrecy rate can be effectively improved by activating at least the number of trusted devices as compared to the number of antennas at the eavesdropper. The secrecy rate is further improved by increasing the cluster size.

Includes members:
  Member "cooperative secure transmission by exploiting social ties in random networks":
    also connected through other hyperedges:
      (none)
  Member "on secrecy performance of antenna selection aided mimo systems against eavesdropping":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "robustness of low complexity massive mimo architectures against passive eavesdropping")
  Member "optimal signaling for secure communications over gaussian mimo wiretap channels":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "semantically secure lattice codes for compound mimo channels")
  Member "optimization of code rates in sisome wiretap channels":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "covert wireless communications with channel inversion power control in rayleigh fading")
  Member "secure and green swipt in distributed antenna networks with limited backhaul capacity":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "joint trajectory and resource allocation design for energy efficient secure uav communication systems")
  Member "power allocation in mimo wiretap channel with statistical csi and finite alphabet input":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "an overview of physical layer security with finite alphabet signaling")
  Member "on secrecy capacity of fast fading mimome wiretap channels with statistical csit":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "almost universal codes for fading wiretap channels")
  Member "full rank solutions for the mimo gaussian wiretap channel with an average power constraint":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "intelligent reflecting surface assisted secure wireless communications with multiple transmit and multiple receive antennas")

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)