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 "hidden and uncontrolled on the emergence of network steganographic threats"):
  Abstract: Network steganography is the art of hiding secret information within innocent network transmissions. Recent findings indicate that novel malware is increasingly using network steganography. Similarly, other malicious activities can profit from network steganography, such as data leakage or the exchange of pedophile data. This paper provides an introduction to network steganography and highlights its potential application for harmful purposes. We discuss the issues related to countering network steganography in practice and provide an outlook on further research directions and problems.

Includes members:
  Member "a pattern based survey and categorization of network covert channel techniques":
    also connected through other hyperedges:
      (none)
  Member "steganography in modern smartphones and mitigation techniques":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "analysis of human awareness of security and privacy threats in smart environments")
  Member "stegtorrent a steganographic method for the p2p file sharing service":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "steganography in modern smartphones and mitigation techniques")
  Member "voip steganography and its detection a survey":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "hierarchical representation network for steganalysis of qim steganography in low bit rate speech signals")
  Member "padsteg introducing inter protocol steganography":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "stegblocks ensuring perfect undetectability of network steganography")
  Member "sending hidden data via google suggest":
    also connected through other hyperedges:
      (none)
  Member "using transcoding for hidden communication in ip telephony":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "movesteg a method of network steganography detection")
  Member "how hidden can be even more hidden":
    also connected through other hyperedges:
      (none)

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)