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 "homomorphic encryption theory and application"):
  Abstract: The goal of this chapter is to present a survey of homomorphic encryption techniques and their applications. After a detailed discussion on the introduction and motivation of the chapter, we present some basic concepts of cryptography. The fundamental theories of homomorphic encryption are then discussed with suitable examples. The chapter then provides a survey of some of the classical homomorphic encryption schemes existing in the current literature. Various applications and salient properties of homomorphic encryption schemes are then discussed in detail. The chapter then introduces the most important and recent research direction in the filed - fully homomorphic encryption. A significant number of propositions on fully homomorphic encryption is then discussed. Finally, the chapter concludes by outlining some emerging research trends in this exicting field of cryptography.

Includes members:
  Member "security in wireless sensor networks":
    also connected through other hyperedges:
      (none)
  Member "security and privacy issues in wireless mesh networks a survey":
    also connected through other hyperedges:
      (none)
  Member "an attack on privacy preserving data aggregation protocol for wireless sensor networks":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "secure and privacy preserving data aggregation protocols for wireless sensor networks")
  Member "secure and privacy preserving data aggregation protocols for wireless sensor networks":
    also connected through other hyperedges:
      (none)
  Member "secure and privacy preserving authentication protocols for wireless mesh networks":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "security and privacy issues in wireless mesh networks a survey")
  Member "a novel mechanism for detection of distributed denial of service attacks":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "security and privacy issues in cloud computing")
  Member "a mechanism for detection of gray hole attack in mobile ad hoc networks":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "security in wireless sensor networks")
  Member "reputation and trust based systems for wireless self organizing networks":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "security and privacy issues in wireless mesh networks a survey")

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)