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 design of artificial noise aided secure multi antenna transmission in slow fading channels"
  Abstract: In this paper, we investigate the design of artificial-noise-aided secure multi-antenna transmission in slow fading channels. The primary design concerns include the transmit power allocation and the rate parameters of the wiretap code. We consider two scenarios with different complexity levels: 1) the design parameters are chosen to be fixed for all transmissions; and 2) they are adaptively adjusted based on the instantaneous channel feedback from the intended receiver. In both scenarios, we provide explicit design solutions for achieving the maximal throughput subject to a secrecy constraint, given by a maximum allowable secrecy outage probability. We then derive accurate approximations for the maximal throughput in both scenarios in the high signal-to-noise ratio region, and give new insights into the additional power cost for achieving a higher security level while maintaining a specified target throughput. In the end, the throughput gain of adaptive transmission over non-adaptive transmission is also quantified and analyzed.

Connected through hyperedge HE-1 (induced by source paper "physical layer security in the finite blocklength regime over fading channels"):
  with members:
    - "secure and energy efficient transmissions in cache enabled heterogeneous cellular networks performance analysis and optimization"
    - "a survey of physical layer security techniques for 5g wireless networks and challenges ahead"
    - "safeguarding decentralized wireless networks using full duplex jamming receivers"
    - "artificial noise aided secure transmission in large scale spectrum sharing networks"
    - "on the spectral efficiency and security enhancements of noma assisted multicast unicast streaming"
    - "finite blocklength bounds for wiretap channels"
    - "a survey on wireless security technical challenges recent advances and future trends"
    - "enhancing the physical layer security of non orthogonal multiple access in large scale networks"

Connected through hyperedge HE-2 (induced by source paper "uav swarm enabled aerial comp a physical layer security perspective"):
  with members:
    - "maritime coverage enhancement using uavs coordinated with hybrid satellite terrestrial networks"
    - "uav communications for 5g and beyond recent advances and future trends"
    - "robust trajectory and transmit power design for secure uav communications"
    - "energy efficient uav communication with trajectory optimization"
    - "linear precoding of data and artificial noise in secure massive mimo systems"
    - "wireless communications with unmanned aerial vehicles opportunities and challenges"
    - "on the security of the automatic dependent surveillance broadcast protocol"
    - "joint transmit beamforming and receive power splitting for miso swipt systems"

Connected through hyperedge HE-3 (induced by source paper "safeguarding millimeter wave communications against randomly located eavesdroppers"):
  with members:
    - "a new look at physical layer security caching and wireless energy harvesting for heterogeneous ultra dense networks"
    - "physical layer security in millimeter wave cellular networks"
    - "physical layer security in heterogeneous cellular networks"
    - "secure communications in millimeter wave ad hoc networks"
    - "channel estimation and hybrid precoding for millimeter wave cellular systems"
    - "tractable model for rate in self backhauled millimeter wave cellular networks"
    - "millimeter wave cellular wireless networks potentials and challenges"
    - "spatially sparse precoding in millimeter wave mimo systems"

Connected through hyperedge HE-4 (induced by source paper "on the security analysis of a cooperative incremental relaying protocol in the presence of an active eavesdropper"):
  with members:
    - "power allocation and cooperative diversity in two way non regenerative cognitive radio networks"
    - "security versus reliability analysis of opportunistic relaying"
    - "opportunistic secrecy with a strict delay constraint"
    - "intercept probability analysis of cooperative wireless networks with best relay selection in the presence of eavesdropping attack"
    - "three receiver broadcast channels with side information"
    - "a secure communication game with a relay helping the eavesdropper"
    - "joint relay and jammer selection for secure two way relay networks"
    - "buffers improve the performance of relay selection"

Connected through hyperedge HE-5 (induced by source paper "secure transmission with covert requirement in untrusted relaying networks"):
  with members:
    - "covert communications versus physical layer security"
    - "joint relay selection and power allocation in large scale mimo systems with untrusted relays and passive eavesdroppers"
    - "covert communication achieved by a greedy relay in wireless networks"
    - "optimal power allocation by imperfect hardware analysis in untrusted relaying networks"
    - "on covert communication with noise uncertainty"
    - "covert communication in the presence of an uninformed jammer"
    - "joint relay and jammer selection improves the physical layer security in the face of csi feedback delays"
    - "secrecy transmit beamforming for heterogeneous networks"

Connected through hyperedge HE-6 (induced by source paper "physical layer security enhancement for satellite communication among similar channels relay selection and power allocation"):
  with members:
    - "physical layer security of a buffer aided full duplex relaying system"
    - "location based beamforming and physical layer security in rician wiretap channels"
    - "artificial noise aided secure multi antenna transmission with limited feedback"
    - "spatially selective artificial noise aided transmit optimization for miso multi eves secrecy rate maximization"

Connected through hyperedge HE-7 (induced by source paper "improving anti eavesdropping ability without eavesdropper s csi a practical secure transmission design perspective"):
  with members:
    - "safeguarding decentralized wireless networks using full duplex jamming receivers"
    - "secrecy in mimo networks with no eavesdropper csit"

Connected through hyperedge HE-8 (induced by source paper "enhancing phy security of cooperative cognitive radio multicast communications"):
  with members:
    - "robust beamforming for secrecy rate in cooperative cognitive radio multicast communications"
    - "robust beamforming for secure communication in systems with wireless information and power transfer"
    - "secrecy wireless information and power transfer with miso beamforming"
    - "improving physical layer secrecy using full duplex jamming receivers"
    - "spatially selective artificial noise aided transmit optimization for miso multi eves secrecy rate maximization"
    - "capacity theorems for the cognitive radio channel with confidential messages"
    - "on secrecy rate of the generalized artificial noise assisted secure beamforming for wiretap channels"
    - "robust beamforming for security in mimo wiretap channels with imperfect csi"

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)