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: "a metapolicy framework for enhancing domain expressiveness on the internet"
  Abstract: Domain Name System (DNS) domains became Internet-level identifiers for entities (like companies, organizations, or individuals) hosting services and sharing resources over the Internet. Domains can specify a set of security policies (such as, email and trust security policies) that should be followed by clients while accessing the resources or services represented by them. Unfortunately, in the current Internet, the policy specification and enforcement are dispersed, non-comprehensive, insecure, and difficult to manage. #R##N#In this paper, we present a comprehensive and secure metapolicy framework for enhancing the domain expressiveness on the Internet. The proposed framework allows the domain owners to specify, manage, and publish their domain-level security policies over the existing DNS infrastructure. The framework also utilizes the existing trust infrastructures (i.e., TLS and DNSSEC) for providing security. By reusing the existing infrastructures, our framework requires minimal changes and requirements for adoption. We also discuss the initial results of the measurements performed to evaluate what fraction of the current Internet can get benefits from deploying our framework. Moreover, overheads of deploying the proposed framework have been quantified and discussed.

Connected through hyperedge HE-1 (induced by source paper "dstc dns based strict tls configurations"):
  with members:
    - "what s in a downgrade a taxonomy of downgrade attacks in the tls protocol and application protocols using tls"
    - "on the feasibility of fine grained tls security configurations in web browsers based on the requested domain name"

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)