human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "security and privacy issues in wireless mesh networks a survey"):
  Abstract: This book chapter identifies various security threats in wireless mesh network (WMN). Keeping in mind the critical requirement of security and user privacy in WMNs, this chapter provides a comprehensive overview of various possible attacks on different layers of the communication protocol stack for WMNs and their corresponding defense mechanisms. First, it identifies the security vulnerabilities in the physical, link, network, transport, application layers. Furthermore, various possible attacks on the key management protocols, user authentication and access control protocols, and user privacy preservation protocols are presented. After enumerating various possible attacks, the chapter provides a detailed discussion on various existing security mechanisms and protocols to defend against and wherever possible prevent the possible attacks. Comparative analyses are also presented on the security schemes with regards to the cryptographic schemes used, key management strategies deployed, use of any trusted third party, computation and communication overhead involved etc. The chapter then presents a brief discussion on various trust management approaches for WMNs since trust and reputation-based schemes are increasingly becoming popular for enforcing security in wireless networks. A number of open problems in security and privacy issues for WMNs are subsequently discussed before the chapter is finally concluded.

Includes members:
  Member "secure and privacy preserving authentication protocols for wireless mesh networks":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "homomorphic encryption theory and application")
  Member "reputation and trust based systems for wireless self organizing networks":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "homomorphic encryption theory and application")
  Member "secure and privacy aware searching in peer to peer networks":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "homomorphic encryption theory and application")
  Member "an efficient and user privacy preserving routing protocol for wireless mesh networks":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "homomorphic encryption theory and application")
  Member "a distributed protocol for detection of packet dropping attack in mobile ad hoc networks":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "homomorphic encryption theory and application")
  Member "cross layer protocols for multimedia communications over wireless networks":
    also connected through other hyperedges:
      (none)
  Member "secure routing in wireless mesh networks":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "secure and privacy preserving authentication protocols for wireless mesh networks")
  Member "a survey on wireless sensor network security":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "securing cluster heads in wireless sensor networks by a hybrid intrusion detection system based on data mining")

Question: Please tell me which class the source paper 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)