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: "joint power control in wiretap interference channels"
  Abstract: Interference in wireless networks degrades the signal quality at the terminals. However, it can potentially enhance the secrecy rate. This paper investigates the secrecy rate in a two-user interference network where one of the users, namely user 1, needs to establish a confidential connection. User 1 wants to prevent an unintended user of the network from decoding its transmission. User 1 has to transmit such that its secrecy rate is maximized while the quality of service at the destination of the other user, user 2, is satisfied, and both user's power limits are taken into account. We consider two scenarios: 1) user 2 changes its power in favor of user 1, an altruistic scenario, and 2) user 2 is selfish and only aims to maintain the minimum quality of service at its destination, an egoistic scenario. It is shown that there is a threshold for user 2's transmission power that only below or above which, depending on the channel qualities, user 1 can achieve a positive secrecy rate. Closed-form solutions are obtained to perform joint optimal power control. Further, a new metric called secrecy energy efficiency is introduced. We show that in general, the secrecy energy efficiency of user 1 in an interference channel scenario is higher than that of an interference-free channel.

Connected through hyperedge HE-1 (induced by source paper "physical layer security for rf satellite channels in the finite length regime"):
  with members:
    - "two way physical layer security protocol for gaussian channels"
    - "free space optical channel estimation for physical layer security"
    - "secure multiplex coding with dependent and non uniform multiple messages"
    - "information theoretic physical layer security for satellite channels"
    - "empirical and strong coordination via soft covering with polar codes"
    - "quantum inspired secure wireless communication protocol under spatial and local gaussian noise assumptions"
    - "secure wireless communication under spatial and local gaussian noise assumptions"
    - "secrecy analysis on network coding in bidirectional multibeam satellite communications"

Connected through hyperedge HE-2 (induced by source paper "secure transmission of delay sensitive data over wireless fading channels"):
  with members:
    - "secure communications in the presence of a buffer aided wireless powered relay with self energy recycling"
    - "a survey on wireless security technical challenges recent advances and future trends"
    - "cross layer scheduling for ofdma based cognitive radio systems with delay and security constraints"
    - "opportunistic secrecy with a strict delay constraint"
    - "energy efficient optimization for physical layer security in multi antenna downlink networks with qos guarantee"
    - "secure wireless communication and optimal power control under statistical queueing constraints"
    - "secure communication in the low snr regime"
    - "analysis of energy efficiency in fading channels under qos constraints"

Connected through hyperedge HE-3 (induced by source paper "secrecy rate region of swipt wiretap interference channels"):
  with members:
    - "optimal power splitting for simultaneous information detection and energy harvesting"
    - "multiobjective signal processing optimization the way to balance conflicting metrics in 5g systems"
    - "optimal relay selection for physical layer security in cooperative wireless networks"
    - "wireless information and power transfer a dynamic power splitting approach"
    - "discrete memoryless interference and broadcast channels with confidential messages secrecy rate regions"
    - "the gaussian multiple access wire tap channel"

Connected through hyperedge HE-4 (induced by source paper "friendly jamming in a mimo wiretap interference network a nonconvex game approach"):
  with members:
    - "physical layer security for massive mimo an overview on passive eavesdropping and active attacks"
    - "real and complex monotone communication games"
    - "joint sensing and power allocation in nonconvex cognitive radio games nash equilibria and distributed algorithms"
    - "on secrecy rate of the generalized artificial noise assisted secure beamforming for wiretap channels"
    - "secure transmission with multiple antennas ii the mimome wiretap channel"
    - "on the secure degrees of freedom in the k user gaussian interference channel"

Connected through hyperedge HE-5 (induced by source paper "improving wireless physical layer security via exploiting co channel interference"):
  with members:
    - "secrecy transmit beamforming for heterogeneous networks"
    - "improving physical layer secrecy using full duplex jamming receivers"
    - "mobile jammers for secrecy rate maximization in cooperative networks"
    - "secure degrees of freedom of k user gaussian interference channels a unified view"
    - "multiuser diversity for secrecy communications using opportunistic jammer selection secure dof and jammer scaling law"
    - "mimo interference alignment over correlated channels with imperfect csi"
    - "interference alignment for secrecy"
    - "on cooperative relaying schemes for wireless physical layer security"

Connected through hyperedge HE-6 (induced by source paper "linear precoder design for a mimo gaussian wiretap channel with full duplex source and destination nodes"):
  with members:
    - "improving wireless physical layer security via exploiting co channel interference"
    - "secrecy transmit beamforming for heterogeneous networks"
    - "resource allocation in full duplex communications for future wireless networks"
    - "improving physical layer secrecy using full duplex jamming receivers"
    - "in band full duplex wireless challenges and opportunities"
    - "mimo interference alignment over correlated channels with imperfect csi"
    - "interference alignment for secrecy"
    - "solutions for the mimo gaussian wiretap channel with a cooperative jammer"

Connected through hyperedge HE-7 (induced by source paper "information theoretic physical layer security for satellite channels"):
  with members:
    - "secure multiplex coding with dependent and non uniform multiple messages"
    - "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"
    - "secure satellite communication systems design with individual secrecy rate constraints"
    - "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-8 (induced by source paper "directional modulation via symbol level precoding a way to enhance security"):
  with members:
    - "energy efficient symbol level precoding in multiuser miso based on relaxed detection region"
    - "secure m psk communication via directional modulation"
    - "symbol level multiuser miso precoding for multi level adaptive modulation a multicast view"
    - "secrecy analysis on network coding in bidirectional multibeam satellite communications"
    - "constructive interference through symbol level precoding for multi level modulation"
    - "constructive multiuser interference in symbol level precoding for the miso downlink channel"
    - "exploiting known interference as green signal power for downlink beamforming optimization"
    - "optimal multiuser transmit beamforming a difficult problem with a simple solution structure"

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)