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: "secure vehicular communication systems implementation performance and research challenges"
  Abstract: Vehicular communication systems are on the verge of practical deployment. Nonetheless, their security and privacy protection is one of the problems that have been addressed only recently. In order to show the feasibility of secure VC, certain implementations are required. we discuss the design of a VC security system that has emerged as a result of the European SeVe-Com project. In this second article we discuss various issues related to the implementation and deployment aspects of secure VC systems. Moreover, we provide an outlook on open security research issues that will arise as VC systems develop from today's simple prototypes to full-fledged systems.

Connected through hyperedge HE-1 (induced by source paper "securing vehicle to everything v2x communication platforms"):
  with members:
    - "survey on misbehavior detection in cooperative intelligent transportation systems"
    - "a security credential management system for v2x communications"
    - "security in automotive networks lightweight authentication and authorization"
    - "analyzing attacks on cooperative adaptive cruise control cacc"
    - "cyber physical systems security a survey"
    - "enhanced position verification for vanets using subjective logic"
    - "efficient detection of sybil attack based on cryptography in vanet"

Connected through hyperedge HE-2 (induced by source paper "survey on misbehavior detection in cooperative intelligent transportation systems"):
  with members:
    - "a security credential management system for v2x communications"
    - "veremi a dataset for comparable evaluation of misbehavior detection in vanets"
    - "analyzing attacks on cooperative adaptive cruise control cacc"
    - "secmace scalable and robust identity and credential management infrastructure in vehicular communication systems"
    - "survey of important issues in uav communication networks"
    - "enhanced position verification for vanets using subjective logic"
    - "data centric misbehavior detection in vanets"
    - "secure vehicular communication systems design and architecture"

Connected through hyperedge HE-3 (induced by source paper "cyber physical security and safety of autonomous connected vehicles optimal control meets multi armed bandit learning"):
  with members:
    - "sleeping multi armed bandit learning for fast uplink grant allocation in machine type communications"
    - "robust deep reinforcement learning for security and safety in autonomous vehicle systems"
    - "joint communication and control for wireless autonomous vehicular platoon systems"
    - "stochastic optimization and control framework for 5g network slicing with effective isolation"
    - "deep learning for signal authentication and security in massive internet of things systems"
    - "deep learning for reliable mobile edge analytics in intelligent transportation systems"
    - "a colonel blotto game for interdependence aware cyber physical systems security in smart cities"
    - "a survey on low latency towards 5g ran core network and caching solutions"

Connected through hyperedge HE-4 (induced by source paper "robust deep reinforcement learning for security and safety in autonomous vehicle systems"):
  with members:
    - "joint communication and control for wireless autonomous vehicular platoon systems"
    - "deep learning for signal authentication and security in massive internet of things systems"
    - "deep learning for reliable mobile edge analytics in intelligent transportation systems"
    - "artificial neural networks based machine learning for wireless networks a tutorial"
    - "colonel blotto game for secure state estimation in interdependent critical infrastructure"
    - "a colonel blotto game for interdependence aware cyber physical systems security in smart cities"
    - "deep reinforcement learning from self play in imperfect information games"
    - "unmanned aerial vehicle with underlaid device to device communications performance and tradeoffs"

Connected through hyperedge HE-5 (induced by source paper "secmace scalable and robust identity and credential management infrastructure in vehicular communication systems"):
  with members:
    - "resilient privacy protection for location based services through decentralization"
    - "security and privacy in vehicular social networks"
    - "evaluating on demand pseudonym acquisition policies in vehicular communication systems"
    - "the key to intelligent transportation identity and credential management in vehicular communication systems"
    - "towards deploying a scalable robust vehicular identity and credential management infrastructure"
    - "vespa vehicular security and privacy preserving architecture"
    - "on the road reflections on the security of vehicular communication systems"
    - "impact of vehicular communications security on transportation safety"

Connected through hyperedge HE-6 (induced by source paper "the case for dynamic key distribution for pki based vanets"):
  with members:
    - "secure vehicular communication systems design and architecture"

Connected through hyperedge HE-7 (induced by source paper "vespa vehicular security and privacy preserving architecture"):
  with members:
    - "impact of vehicular communications security on transportation safety"
    - "secure vehicular communication systems design and architecture"

Connected through hyperedge HE-8 (induced by source paper "data centric misbehavior detection in vanets"):
  with members:
    - "secure vehicular communication systems design and architecture"

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)