human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "active cyber defense dynamics exhibiting rich phenomena"):
  Abstract: The Internet is a man-made complex system under constant attacks (e.g., Advanced Persistent Threats and malwares). It is therefore important to understand the phenomena that can be induced by the interaction between cyber attacks and cyber defenses. In this paper, we explore the rich phenomena that can be exhibited when the defender employs active defense to combat cyber attacks. To the best of our knowledge, this is the first study that shows that {\em active cyber defense dynamics} (or more generally, {\em cybersecurity dynamics}) can exhibit the bifurcation and chaos phenomena. This has profound implications for cyber security measurement and prediction: (i) it is infeasible (or even impossible) to accurately measure and predict cyber security under certain circumstances; (ii) the defender must manipulate the dynamics to avoid such {\em unmanageable situations} in real-life defense operations.

Includes members:
  Member "a stochastic model of active cyber defense dynamics":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "preventive and reactive cyber defense dynamics with ergodic time dependent parameters is globally attractive")
  Member "push and pull based epidemic spreading in networks thresholds and deeper insights":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "metrics towards measuring cyber agility")
  Member "optimizing active cyber defense":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "metrics towards measuring cyber agility")
  Member "an extended stochastic model for quantitative security analysis of networked systems":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "metrics towards measuring cyber agility")
  Member "a new approach to modeling and analyzing security of networked systems":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "preventive and reactive cyber defense dynamics with ergodic time dependent parameters is globally attractive")
  Member "characterizing the power of moving target defense via cyber epidemic dynamics":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "preventive and reactive cyber defense dynamics with ergodic time dependent parameters is globally attractive")

Question: Please tell me which class the source paper 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)