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: "sail machine learning guided structural analysis attack on hardware obfuscation"
  Abstract: Obfuscation is a technique for protecting hardware intellectual property (IP) blocks against reverse engineering, piracy, and malicious modifications. Current obfuscation efforts mainly focus on functional locking of a design to prevent black-box usage. They do not directly address hiding design intent through structural transformations, which is an important objective of obfuscation. We note that current obfuscation techniques incorporate only: (1) local, and (2) predictable changes in circuit topology. In this paper, we present SAIL, a structural attack on obfuscation using machine learning (ML) models that exposes a critical vulnerability of these methods. Through this attack, we demonstrate that the gate-level structure of an obfuscated design can be retrieved in most parts through a systematic set of steps. The proposed attack is applicable to all forms of logic obfuscation, and significantly more powerful than existing attacks, e.g., SAT-based attacks, since it does not require the availability of golden functional responses (e.g. an unlocked IC). Evaluation on benchmark circuits show that we can recover an average of around 84% (up to 95%) transformations introduced by obfuscation. We also show that this attack is scalable, flexible, and versatile.

Connected through hyperedge HE-1 (induced by source paper "hardware security for and beyond cmos technology an overview on fundamentals applications and challenges"):
  with members:
    - "towards secure composition of integrated circuits and electronic systems on the role of eda"
    - "exploiting spin orbit torque devices as reconfigurable logic for circuit obfuscation"
    - "smart secure magnetoelectric antiferromagnet based tamper proof non volatile memory"
    - "a modern approach to ip protection and trojan prevention split manufacturing for 3d ics and obfuscation of vertical interconnects"
    - "a new paradigm in split manufacturing lock the feol unlock at the beol"
    - "spin orbit torque devices for hardware security from deterministic to probabilistic regime"
    - "protect your chip design intellectual property an overview"
    - "zombieload cross privilege boundary data sampling"

Connected through hyperedge HE-2 (induced by source paper "towards secure composition of integrated circuits and electronic systems on the role of eda"):
  with members:
    - "protect your chip design intellectual property an overview"
    - "concerted wire lifting enabling secure and cost effective split manufacturing"
    - "processor hardware security vulnerabilities and their detection by unique program execution checking"
    - "rethinking split manufacturing an information theoretic approach with secure layout techniques"
    - "tpad hardware trojan prevention and detection for trusted integrated circuits"

Connected through hyperedge HE-3 (induced by source paper "defense in depth a recipe for logic locking to prevail"):
  with members:
    - "functional analysis attacks on logic locking"
    - "taal tampering attack on any key based logic locked circuits"
    - "threats on logic locking a decade later"
    - "logic locking for secure outsourced chip fabrication a new attack and provably secure defense mechanism"
    - "physical design obfuscation of hardware a comprehensive investigation of device and logic level techniques"
    - "threshold based obfuscated keys with quantifiable security against invasive readout"

Connected through hyperedge HE-4 (induced by source paper "coma communication and obfuscation management architecture"):
  with members:
    - "functional analysis attacks on logic locking"
    - "threats on logic locking a decade later"
    - "srclock sat resistant cyclic logic locking for protecting the hardware"
    - "benchmarking the capabilities and limitations of sat solvers in defeating obfuscation schemes"
    - "lut lock a novel lut based logic obfuscation for fpga bitstream and asic hardware protection"

Connected through hyperedge HE-5 (induced by source paper "spin orbit torque devices for hardware security from deterministic to probabilistic regime"):
  with members:
    - "exploiting spin orbit torque devices as reconfigurable logic for circuit obfuscation"
    - "concerted wire lifting enabling secure and cost effective split manufacturing"
    - "rethinking split manufacturing an information theoretic approach with secure layout techniques"
    - "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"

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)