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: "harmful devices considered harmless"
  Abstract: Attacks on host computers by malicious peripherals are a growing problem; the inexorable advance of powerful, small, cheap peripherals, which attach to plug-and-play buses, has made such attacks easy to mount. At the same time, commodity operating systems lack systematic defenses. #R##N#We present Cinch, a pragmatic response to this threat. Cinch transforms USB peripherals to untrusted network endpoints, thereby allowing users and administrators to deploy a rich, existing toolbox from network security (firewalls, VPNs, DPIs, etc.) to defend the computer in a systematic way. Cinch uses virtualization technology to place the hardware in a logically separate and untrusted machine, and includes an interposition layer between the untrusted machine and the protected one. This layer accepts or rejects interaction with devices and enforces strict standards-compliant behavior, presenting to the protected machine the abstraction of "well-behaved" peripherals. We show that Cinch can be easily implemented on existing operating systems, concisely expresses policies that thwart many real-world attacks, and has low overhead.

Connected through hyperedge HE-1 (induced by source paper "firmusb vetting usb device firmware using domain informed symbolic execution"):
  with members:
    - "pagai a path sensitive static analyzer"

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.OS(Operating Systems)