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: "security in wireless sensor networks issues and challenges"
  Abstract: Wireless Sensor Network (WSN) is an emerging technology that shows great promise for various futuristic applications both for mass public and military. The sensing technology combined with processing power and wireless communication makes it lucrative for being exploited in abundance in future. The inclusion of wireless communication technology also incurs various types of security threats. The intent of this paper is to investigate the security related issues and challenges in wireless sensor networks. We identify the security threats, review proposed security mechanisms for wireless sensor networks. We also discuss the holistic view of security for ensuring layered and robust security in wireless sensor networks.

Connected through hyperedge HE-1 (induced by source paper "a survey on hardware based security mechanisms for internet of things"):
  with members:
    - "a solution for dynamic spectrum management in mission critical uav networks"
    - "a proof of concept sram based physically unclonable function puf key generation mechanism for iot devices"
    - "ring oscillator and its application as physical unclonable function puf for password management"
    - "overview of blakley s secret sharing scheme"
    - "internet of things survey on security"
    - "distributed cooperative spectrum sharing in uav networks using multi agent reinforcement learning"
    - "a reputation based stackelberg game model to enhance secrecy rate in spectrum leasing to selfish iot devices"
    - "a secret key generation scheme for internet of things using ternary states reram based physical unclonable functions"

Connected through hyperedge HE-2 (induced by source paper "security of the internet of things vulnerabilities attacks and countermeasures"):
  with members:
    - "security implications of fog computing on the internet of things"
    - "a survey on sensor based threats to internet of things iot devices and applications"
    - "understanding iot security through the data crystal ball where we are now and where we are going to be"
    - "spying on the smart home privacy attacks and defenses on encrypted iot traffic"
    - "survey of security and privacy issues of internet of things"
    - "trail topology authentication in rpl"
    - "a survey of attacks security mechanisms and challenges in wireless sensor networks"

Connected through hyperedge HE-3 (induced by source paper "applications of economic and pricing models for wireless network security a survey"):
  with members:
    - "charging and discharging of plug in electric vehicles pevs in vehicle to grid v2g systems a cyber insurance based model"
    - "data collection and wireless communication in internet of things iot using economic analysis and pricing models a survey"
    - "improving physical layer security in wireless communications using diversity techniques"
    - "a multitier wireless spectrum sharing system leveraging secure spectrum auctions"
    - "decomposition by partial linearization parallel optimization of multi agent systems"
    - "principles of physical layer security in multiuser wireless networks a survey"
    - "incentives for privacy tradeoff in community sensing"
    - "ps trust provably secure solution for truthful double spectrum auctions"

Connected through hyperedge HE-4 (induced by source paper "wireless security with beamforming technique"):
  with members:
    - "physical layer cryptography through massive mimo"
    - "location based beamforming for enhancing secrecy in rician wiretap channels"
    - "jamming aided secure communication in massive mimo rician channels"
    - "on the secrecy outage capacity of physical layer security in large scale mimo relaying systems with imperfect csi"
    - "principles of physical layer security in multiuser wireless networks a survey"
    - "energy and spectral efficiency of very large multiuser mimo systems"
    - "rethinking the secrecy outage formulation a secure transmission design perspective"
    - "cooperative jamming for secure communications in mimo relay networks"

Connected through hyperedge HE-5 (induced by source paper "achievable secrecy rates of an energy harvesting device"):
  with members:
    - "energy harvesting wireless communications a review of recent advances"
    - "joint transmission and energy transfer policies for energy harvesting devices with finite batteries"
    - "energy harvesting for secure ofdma systems"
    - "robust beamforming for secure communication in systems with wireless information and power transfer"
    - "principles of physical layer security in multiuser wireless networks a survey"
    - "awgn channel under time varying amplitude constraints with causal information at the transmitter"
    - "optimum transmission policies for battery limited energy harvesting nodes"
    - "information theoretic analysis of an energy harvesting communication system"

Connected through hyperedge HE-6 (induced by source paper "steganography a secure way for transmission in wireless sensor networks"):
  with members:
    - "a novel magic lsb substitution method m lsb sm using multi level encryption and achromatic component of an image"
    - "a new image steganographic technique using pattern based bits shuffling and magic lsb for grayscale images"
    - "an adaptive secret key directed cryptographic scheme for secure transmission in wireless sensor networks"
    - "describing colors textures and shapes for content based image retrieval a survey"
    - "a secure cyclic steganographic technique for color images using randomization"
    - "a novel image steganographic approach for hiding text in color images using hsi color model"
    - "ontology based secure retrieval of semantically significant visual contents"
    - "secure image steganography using cryptography and image transposition"

Connected through hyperedge HE-7 (induced by source paper "an adaptive secret key directed cryptographic scheme for secure transmission in wireless sensor networks"):
  with members:
    - "a secure cyclic steganographic technique for color images using randomization"
    - "a novel image steganographic approach for hiding text in color images using hsi color model"
    - "ontology based secure retrieval of semantically significant visual contents"
    - "on topological properties of wireless sensor networks under the q composite key predistribution scheme with on off channels"

Connected through hyperedge HE-8 (induced by source paper "reliability analysis to overcome black hole attack in wireless sensor network"):
  with members:
    - "a survey of attacks security mechanisms and challenges in wireless sensor networks"

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.NI(Networking and Internet Architecture)