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 network in business to business application by using access control list acl and service level agreement sla"
  Abstract: The motivation behind this paper is to dissecting the secure network for Business to Business (B2B) application by Implementing Access Control List (ACL) and Service Level Agreement (SLA). This data provides the nature of attacks reported as external or internal attacks. This paper presents the initial finding of attacks, types of attacks and their ratio within specific time. It demonstrates the advance technique and methodology to reduce the attacks and vulnerabilities and minimize the ratio of attacks to the networks and application and keep the network secure and runs application smoothly regarding that. It also identifies the location of attacks, the reason behind the attack and the technique used in attacking. The whole field of system security is limitless and in an evolutionary stage. To comprehend the exploration being performed today, foundation learning of the web and assaults, the security is vital and in this way they are investigated. It provides the statistical analytics about various attacks and nature of attacks for acquiring the results through simulation to prove the hypothesis.

Connected through hyperedge HE-1 (induced by source paper "load balancing with preemptive and non preemptive task scheduling in cloud computing"):
  with members:
    - "application of selective algorithm for effective resource provisioning in cloud computing environment"

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)