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: "introducing the robot security framework rsf a standardized methodology to perform security assessments in robotics"
  Abstract: Robots have gained relevance in society, increasingly performing critical tasks. Nonetheless, robot security is being underestimated. Robotics security is a complex landscape, which often requires a cross-disciplinar perspective to which classical security lags behind. To address this issue, we present the Robot Security Framework (RSF), a methodology to perform systematic security assessments in robots. We propose, adapt and develop specific terminology and provide guidelines to enable a holistic security assessment following four main layers (Physical, Network, Firmware and Application). We argue that modern robotics should regard as equally relevant internal and external communication security. Finally, we advocate against "security by obscurity". We conclude that the field of security in robotics deserves further research efforts.

Connected through hyperedge HE-1 (induced by source paper "industrial robot ransomware akerbeltz"):
  with members:
    - "introducing the robot vulnerability database rvd"
    - "towards an open standard for assessing the severity of robot security vulnerabilities the robot vulnerability scoring system rvss"
    - "robot hazards from safety to security"

Connected through hyperedge HE-2 (induced by source paper "robotics ctf rctf a playground for robot hacking"):
  with members:
    - "adding salt to pepper a structured security assessment over a humanoid robot"
    - "towards an open standard for assessing the severity of robot security vulnerabilities the robot vulnerability scoring system rvss"
    - "scanning the internet for ros a view of security in robotics research"
    - "robot hazards from safety to security"
    - "sros securing ros over the wire in the graph and through the kernel"

Connected through hyperedge HE-3 (induced by source paper "aztarna a footprinting tool for robots"):
  with members:
    - "towards an open standard for assessing the severity of robot security vulnerabilities the robot vulnerability scoring system rvss"
    - "scanning the internet for ros a view of security in robotics research"
    - "robot hazards from safety to security"
    - "robotics ctf rctf a playground for robot hacking"

Connected through hyperedge HE-4 (induced by source paper "towards an open standard for assessing the severity of robot security vulnerabilities the robot vulnerability scoring system rvss"):
  with members:
    - "a look at the time delays in cvss vulnerability scoring"
    - "robot hazards from safety to security"

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)