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: "when watchdog meets coding"
  Abstract: In this work we study the problem of misbehavior detection in wireless networks. A commonly adopted approach is to utilize the broadcasting nature of the wireless medium and have nodes monitor their neighborhood. We call such nodes the Watchdogs. In this paper, we first show that even if a watchdog can overhear all packet transmissions of a flow, any linear operation of the overheard packets can not eliminate miss-detection and is inefficient in terms of bandwidth. We propose a light-weigh misbehavior detection scheme which integrates the idea of watchdogs and error detection coding. We show that even if the watchdog can only observe a fraction of packets, by choosing the encoder properly, an attacker will be detected with high probability while achieving throughput arbitrarily close to optimal. Such properties reduce the incentive for the attacker to attack.

Connected through hyperedge HE-1 (induced by source paper "on detecting pollution attacks in inter session network coding"):
  with members:
    - "cooperative defense against pollution attacks in network coding using spacemac"
    - "a multi hop multi source algebraic watchdog"
    - "an algebraic watchdog for wireless network coding"
    - "coding for errors and erasures in random network coding"

Connected through hyperedge HE-2 (induced by source paper "algebraic watchdog mitigating misbehavior in wireless network coding"):
  with members:
    - "on counteracting byzantine attacks in network coded peer to peer networks"
    - "an algebraic watchdog for wireless network coding"
    - "coding for errors and erasures in random network coding"
    - "on coding for reliable communication over packet networks"

Connected through hyperedge HE-3 (induced by source paper "polytope codes against adversaries in networks"):
  with members:
    - "on secure network coding with nonuniform or restricted wiretap sets"
    - "network error correction with unequal link capacities"
    - "an algebraic watchdog for wireless network coding"
    - "coding for errors and erasures in random network coding"

Connected through hyperedge HE-4 (induced by source paper "a multi hop multi source algebraic watchdog"):
  with members:
    - "an algebraic watchdog for wireless network coding"

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)