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: "covert attacks in cyber physical control systems"
  Abstract: The advantages of using communication networks to interconnect controllers and physical plants motivate the increasing number of networked control systems in industrial and critical infrastructure facilities. However, this integration also exposes such control systems to new threats, typical of the cyber domain. In this context, studies have been conducted, aiming to explore vulnerabilities and propose security solutions for cyber-physical systems. In this paper, a covert attack for service degradation is proposed, which is planned based on the intelligence gathered by another attack, herein proposed, referred as system identification attack. The simulation results demonstrate that the joint operation of the two attacks is capable to affect, in a covert and accurate way, the physical behavior of a system.

Connected through hyperedge HE-1 (induced by source paper "compensation of linear attacks to cyber physical systems through arx system identification"):
  with members:
    - "optimal thresholds for anomaly based intrusion detection in dynamical environments"

Connected through hyperedge HE-2 (induced by source paper "data management in industry 4 0 state of the art and open challenges"):
  with members:
    - "avoiding the internet of insecure industrial things"
    - "energy optimization of robotic cells"
    - "sre semantic rules engine for the industrial internet of things gateways"
    - "acceleration of a full scale industrial cfd application with op2"
    - "intercept behavior analysis of industrial wireless sensor networks in the presence of eavesdropping attack"
    - "a cyber physical system based approach for industrial automation systems"

Connected through hyperedge HE-3 (induced by source paper "data management in networked industrial environments state of the art and open challenges"):
  with members:
    - "energy optimization of robotic cells"
    - "sre semantic rules engine for the industrial internet of things gateways"
    - "intercept behavior analysis of industrial wireless sensor networks in the presence of eavesdropping attack"

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.CR(Cryptography and Security)