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: "wireless information surveillance via proactive eavesdropping with spoofing relay"
  Abstract: Wireless information surveillance, by which suspicious wireless communications are closely monitored by legitimate agencies, is an integral part of national security. To enhance the information surveillance capability, we propose in this paper a new proactive eavesdropping approach via a spoofing relay, where the legitimate monitor operates in a full-duplex manner with simultaneous eavesdropping and spoofing relaying to vary the source transmission rate in favor of the eavesdropping performance. To this end, a power splitting receiver is proposed, where the signal received at each antenna of the legitimate monitor is split into two parts for information eavesdropping and spoofing relaying, respectively. We formulate an optimization problem to maximize the achievable eavesdropping rate by jointly optimizing the power splitting ratios and relay precoding matrix at the multiantenna monitor. Depending on the suspicious and eavesdropping channel conditions, the optimal solution corresponds to three possible spoofing relay strategies, namely  constructive relaying ,  jamming , and  simultaneous jamming and destructive relaying . Numerical results show that the proposed technique significantly improves the eavesdropping rate of the legitimate monitor as compared to the existing passive eavesdropping and jamming-assisted eavesdropping schemes.

Connected through hyperedge HE-1 (induced by source paper "secrecy and covert communications against uav surveillance via multi hop networks"):
  with members:
    - "safeguarding wireless network with uavs a physical layer security perspective"
    - "coverage probability analysis of uav cellular networks in urban environments"
    - "secure routing with power optimization for ad hoc networks"
    - "securing uav communications via joint trajectory and power control"
    - "multi hop routing in covert wireless networks"
    - "robust trajectory and transmit power design for secure uav communications"
    - "securing uav communications via trajectory optimization"
    - "covert communication in fading channels under channel uncertainty"

Connected through hyperedge HE-2 (induced by source paper "jamming assisted eavesdropping over parallel fading channels"):
  with members:
    - "multi antenna wireless legitimate surveillance systems design and performance analysis"
    - "proactive eavesdropping via jamming over harq based communications"
    - "surveillance and intervention of infrastructure free mobile communications a new wireless security paradigm"
    - "a survey on wireless security technical challenges recent advances and future trends"
    - "proactive eavesdropping via cognitive jamming in fading channels"
    - "improving physical layer security in wireless communications using diversity techniques"
    - "proactive eavesdropping via jamming for rate maximization over rayleigh fading channels"
    - "physical layer security for massive mimo an overview on passive eavesdropping and active attacks"

Connected through hyperedge HE-3 (induced by source paper "multi antenna wireless legitimate surveillance systems design and performance analysis"):
  with members:
    - "secure massive mimo systems with limited rf chains"
    - "analysis and design of secure massive mimo systems in the presence of hardware impairments"
    - "on secrecy performance of antenna selection aided mimo systems against eavesdropping"
    - "linear precoding of data and artificial noise in secure massive mimo systems"
    - "throughput analysis and optimization of wireless powered multiple antenna full duplex relay systems"
    - "a survey on wireless security technical challenges recent advances and future trends"
    - "proactive eavesdropping via cognitive jamming in fading channels"
    - "improving physical layer security in wireless communications using diversity techniques"

Connected through hyperedge HE-4 (induced by source paper "proactive eavesdropping via jamming over harq based communications"):
  with members:
    - "multi antenna wireless legitimate surveillance systems design and performance analysis"
    - "wireless surveillance of two hop communications"
    - "surveillance and intervention of infrastructure free mobile communications a new wireless security paradigm"
    - "a survey on wireless security technical challenges recent advances and future trends"
    - "proactive eavesdropping via cognitive jamming in fading channels"
    - "proactive eavesdropping via jamming for rate maximization over rayleigh fading channels"
    - "in band full duplex wireless challenges and opportunities"

Connected through hyperedge HE-5 (induced by source paper "wireless surveillance of two hop communications"):
  with members:
    - "surveillance and intervention of infrastructure free mobile communications a new wireless security paradigm"
    - "a survey on wireless security technical challenges recent advances and future trends"
    - "fundamental rate limits of physical layer spoofing"
    - "wireless communications with unmanned aerial vehicles opportunities and challenges"
    - "proactive eavesdropping via cognitive jamming in fading channels"
    - "physical layer security for massive mimo an overview on passive eavesdropping and active attacks"

Connected through hyperedge HE-6 (induced by source paper "proactive eavesdropping in relaying systems"):
  with members:
    - "multi antenna wireless legitimate surveillance systems design and performance analysis"
    - "a survey on wireless security technical challenges recent advances and future trends"
    - "proactive eavesdropping via cognitive jamming in fading channels"
    - "proactive eavesdropping via jamming for rate maximization over rayleigh fading channels"
    - "relaying protocols for wireless energy harvesting and information processing"

Connected through hyperedge HE-7 (induced by source paper "transmit optimization for symbol level spoofing"):
  with members:
    - "wireless surveillance of two hop communications"
    - "surveillance and intervention of infrastructure free mobile communications a new wireless security paradigm"
    - "a survey on wireless security technical challenges recent advances and future trends"
    - "directional modulation via symbol level precoding a way to enhance security"
    - "proactive eavesdropping via cognitive jamming in fading channels"
    - "active eavesdropping via spoofing relay attack"
    - "proactive eavesdropping via jamming for rate maximization over rayleigh fading channels"
    - "constructive multiuser interference in symbol level precoding for the miso downlink channel"

Connected through hyperedge HE-8 (induced by source paper "fundamental rate limits of physical layer spoofing"):
  with members:
    - "surveillance and intervention of infrastructure free mobile communications a new wireless security paradigm"
    - "a survey on wireless security technical challenges recent advances and future trends"
    - "transmit optimization for symbol level spoofing"
    - "proactive eavesdropping via cognitive jamming in fading channels"
    - "active eavesdropping via spoofing relay attack"
    - "proactive eavesdropping via jamming for rate maximization over rayleigh fading channels"

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)