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: "threshold dependent camouflaged cells to secure circuits against reverse engineering attacks"
  Abstract: With current tools and technology, someone who has physical access to a chip can extract the detailed layout of the integrated circuit (IC). By using advanced visual imaging techniques, reverse engineering can reveal details that are meant to be kept secret, such as a secure protocol or novel implementation that offers a competitive advantage. A promising solution to defend against reverse engineering attacks is IC camouflaging. In this work, we propose a new camouflaging technique based on the threshold voltage of the transistors. We refer to these cells as threshold dependent camouflaged cells. Our work differs from current commercial solutions in that the latter use look-alike cells, with the assumption that it is difficult for the reverse engineer to identify the cell's functionality. Yet, if a structural distinction between cells exists, then these are still vulnerable, especially as reverse engineers use more advanced and precise techniques. On the other hand, the proposed threshold dependent standard cells are structurally identical regardless of the cells' functionality. Detailed circuit simulations of our proposed threshold dependent camouflaged cells demonstrate that they can be used to cost-effectively and robustly camouflage large netlists. Corner analysis of process, temperature, and supply voltage (PVT) variations show that our cells operate as expected over all PVT corners simulated.

Connected through hyperedge HE-1 (induced by source paper "protect your chip design intellectual property an overview"):
  with members:
    - "functional analysis attacks on logic locking"
    - "a new paradigm in split manufacturing lock the feol unlock at the beol"
    - "srclock sat resistant cyclic logic locking for protecting the hardware"
    - "best of both worlds integration of split manufacturing and camouflaging into a security driven cad flow for 3d ics"
    - "concerted wire lifting enabling secure and cost effective split manufacturing"
    - "opening the doors to dynamic camouflaging harnessing the power of polymorphic devices"
    - "sat based reverse engineering of gate level schematics using fault injection and probing"
    - "advancing hardware security using polymorphic and stochastic spin hall effect devices"

Connected through hyperedge HE-2 (induced by source paper "best of both worlds integration of split manufacturing and camouflaging into a security driven cad flow for 3d ics"):
  with members:
    - "spectre attacks exploiting speculative execution"
    - "concerted wire lifting enabling secure and cost effective split manufacturing"
    - "advancing hardware security using polymorphic and stochastic spin hall effect devices"
    - "rethinking split manufacturing an information theoretic approach with secure layout techniques"
    - "a novel interconnect camouflaging technique using transistor threshold voltage"
    - "obfuscating the interconnects low cost and resilient full chip layout camouflaging"
    - "physical design obfuscation of hardware a comprehensive investigation of device and logic level techniques"

Connected through hyperedge HE-3 (induced by source paper "obfuscating the interconnects low cost and resilient full chip layout camouflaging"):
  with members:
    - "design automation for obfuscated circuits with multiple viable functions"
    - "physical design obfuscation of hardware a comprehensive investigation of device and logic level techniques"
    - "limits on fundamental limits to computation"

Connected through hyperedge HE-4 (induced by source paper "threshold based obfuscated keys with quantifiable security against invasive readout"):
  with members:
    - "design automation for obfuscated circuits with multiple viable functions"
    - "physical design obfuscation of hardware a comprehensive investigation of device and logic level techniques"

Connected through hyperedge HE-5 (induced by source paper "design automation for obfuscated circuits with multiple viable functions"):
  with members:
    - "threshold voltage defined switches for programmable gates"

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)