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: "the case for dynamic key distribution for pki based vanets"
  Abstract: Vehicular Ad hoc Networks (VANETs) are becoming a reality where secure communication is a prerequisite. Public key infrastructure (PKI) can be used to secure VANETs where an onboard tamper proof device (TPD) stores a number of encryption keys which are renewed upon visiting a certificate authority (CA). We previously proposed a dynamic key distribution protocol for PKI-based VANETs [1] to reduce the role of the TPD. A vehicle dynamically requests a key from its nearest road side unit. This request is propagated through network infrastructure to reach a CA cloud and a key is securely returned. A proposed key revocation mechanism reduced the number of messages needed for revocation through Certificate Revocation List (CRL) distribution. In this paper, performance evaluation and security of the proposed dynamic key distribution is investigated analytically and through network simulation. Furthermore, extensive analysis is performed to demonstrate how the proposed protocol can dynamically support efficient and cost-reduced key distribution. Analysis and performance evaluation results clearly make the case for dynamic key distribution for PKI-based VANETS.

Connected through hyperedge HE-1 (induced by source paper "a secure and authenticated key management protocol sa kmp for vehicular networks"):
  with members:
    - "automatic verification of correspondences for security protocols"

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.NI(Networking and Internet Architecture)