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: "secure satellite communication systems design with individual secrecy rate constraints"
  Abstract: In this paper, we study multibeam satellite secure communication through physical (PHY) layer security techniques, i.e., joint power control and beamforming. By first assuming that the channel state information (CSI) is available and the beamforming weights are fixed, a novel secure satellite system design is investigated to minimize the transmit power with individual secrecy rate constraints. An iterative algorithm is proposed to obtain an optimized power allocation strategy. Moreover, suboptimal beamforming weights are obtained by completely eliminating the cochannel interference and nulling the eavesdroppers' signal simultaneously. In order to obtain jointly optimized power allocation and a beamforming strategy in some practical cases, e.g., with certain estimation errors of the CSI, we further evaluate the impact of the eavesdropper's CSI on the secure multibeam satellite system design. The convergence of the iterative algorithm is proven under justifiable assumptions. The performance is evaluated by taking into account the impact of the number of antenna elements, number of beams, individual secrecy rate requirement, and CSI. The proposed novel secure multibeam satellite system design can achieve optimized power allocation to ensure the minimum individual secrecy rate requirement. The results show that the joint beamforming scheme is more favorable than the fixed beamforming scheme, especially in the cases of a larger number of satellite antenna elements and higher secrecy rate requirement. Finally, we compare the results under the current satellite air-interface in DVB-S2 and the results under Gaussian inputs.

Connected through hyperedge HE-1 (induced by source paper "resource allocations for secure cognitive satellite terrestrial networks"):
  with members:
    - "spatially selective artificial noise aided transmit optimization for miso multi eves secrecy rate maximization"

Connected through hyperedge HE-2 (induced by source paper "information theoretic physical layer security for satellite channels"):
  with members:
    - "secure multiplex coding with dependent and non uniform multiple messages"
    - "joint power control in wiretap interference channels"
    - "tight exponential analysis of universally composable privacy amplification and its applications"
    - "coding with scrambling concatenation and harq for the awgn wire tap channel a security gap analysis"
    - "exponential decreasing rate of leaked information in universal random privacy amplification"
    - "achieving the secrecy capacity of wiretap channels using polar codes"
    - "strong secrecy on the binary erasure wiretap channel using large girth ldpc codes"
    - "applications of ldpc codes to the wiretap channel"

Connected through hyperedge HE-3 (induced by source paper "secrecy analysis on network coding in bidirectional multibeam satellite communications"):
  with members:
    - "secure communication over parallel relay channel"
    - "a secure communication game with a relay helping the eavesdropper"
    - "interference alignment for secrecy"
    - "joint relay and jammer selection for secure two way relay networks"
    - "physical layer security combining error control coding and cryptography"

Connected through hyperedge HE-4 (induced by source paper "beamforming for miso interference channels with qos and rf energy transfer"):
  with members:
    - "multiuser miso beamforming for simultaneous wireless information and power transfer"
    - "joint transmit beamforming and receive power splitting for miso swipt systems"
    - "joint beamforming and power control in coordinated multicell max min duality effective network and large system transition"
    - "relaying protocols for wireless energy harvesting and information processing"
    - "relay selection for simultaneous information transmission and wireless energy transfer a tradeoff perspective"
    - "wireless information and power transfer a dynamic power splitting approach"
    - "two way communication with energy exchange"
    - "throughput maximization for an energy harvesting communication system with processing cost"

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)