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 "pingpong packet level signatures for smart home device events"):
  Abstract: Smart home devices are vulnerable to passive inference attacks based on network traffic, even in the presence of encryption. In this paper, we present PingPong, a tool that can automatically extract packet-level signatures (i.e., simple sequences of packet lengths and directions) from the network traffic of smart home devices, and use those signatures to detect occurrences of specific device events (e.g., light bulb turning ON/OFF). We evaluated PingPong on popular smart home devices ranging from smart plugs to thermostats and home security systems. We have successfully: (1) extracted packet-level signatures from 18 devices (11 of which are the most popular smart home devices on Amazon) from 15 popular vendors, (2) used those signatures to detect occurrences of specific device events with an average recall of more than 97%, and (3) shown that the signatures are unique among tens of millions of packets of real world network traffic.

Includes members:
  Member "machine learning ddos detection for consumer internet of things devices":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "iot behavioral monitoring via network traffic analysis")
  Member "peek a boo i see your smart home activities even encrypted":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "iot behavioral monitoring via network traffic analysis")
  Member "keeping the smart home private with smart er iot traffic shaping":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "characterizing smart home iot traffic in the wild")
  Member "a smart home is no castle privacy vulnerabilities of encrypted iot traffic":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "iot behavioral monitoring via network traffic analysis")
  Member "spying on the smart home privacy attacks and defenses on encrypted iot traffic":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "et tu alexa when commodity wifi devices turn into adversarial motion sensors")
  Member "closing the blinds four strategies for protecting smart home privacy from network observers":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "pfirewall semantics aware customizable data flow control for home automation systems")
  Member "k fingerprinting a robust scalable website fingerprinting technique":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "blind adversarial network perturbations")

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.NI(Networking and Internet Architecture)