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: "irs based wireless jamming attacks when jammers can attack without power"
  Abstract: This paper introduces a new type of wireless jamming attack, called IRS jamming attack, which enables a jammer to attack a legitimate communication without using any internal energy to generate jamming signals. In particular, for such kind of attacks, the jammer uses an Intelligent Reflection Surface (IRS) which can control reflected signals to diminish the Signal-to-Interference-plus-Noise Ratio (SINR) at the legitimate receiver. To be more specific, once receiving signals from the legitimate transmitter, the IRS jammer will adjust its phase shifts to minimize the received signals at the legitimate receiver. In other words, the jammer can launch jamming attacks just by leveraging signals from the legitimate transmitter. Through simulation results, we show that by using the IRS-based jammer, we can reduce the signal power received at the legitimate receiver by up to 98\%. Interestingly, the performance of the proposed IRS jammer is even better than that of the conventional active jamming attacks, although the IRS jammer does not need to use any energy to launch jamming attacks.

Connected through hyperedge HE-1 (induced by source paper "on the impact of phase shifting designs on irs noma"):
  with members:
    - "intelligent reflecting surface versus decode and forward how large surfaces are needed to beat relaying"
    - "reflections in the sky millimeter wave communication with uav carried intelligent reflectors"
    - "reflect and transmit array antennas for scalable and energy efficient mmwave massive mimo"
    - "smart radio environments empowered by ai reconfigurable meta surfaces an idea whose time has come"
    - "intelligent reflecting and transmitting surface aided millimeter wave massive mimo"
    - "a simple design of irs noma transmission"
    - "towards smart and reconfigurable environment intelligent reflecting surface aided wireless network"
    - "intelligent reflecting surface enhanced wireless network via joint active and passive beamforming"

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)