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 "cloudme forensics a case of big data forensic investigation"):
  Abstract: The significant increase in the volume, variety and velocity of data complicates cloud forensic efforts, as such big data will, at some point, become computationally expensive to be fully extracted and analyzed in a timely manner. Thus, it is important for a digital forensic practitioner to have a well-rounded knowledge about the most relevant data artefacts that could be forensically recovered from the cloud product under investigation. In this paper, CloudMe, a popular cloud storage service, is studied. The types and locations of the artefacts relating to the installation and uninstallation of the client application, logging in and out, and file synchronization events from the computer desktop and mobile clients are described. Findings from this research will pave the way towards the development of tools and techniques (e.g. data mining techniques) for cloud-enabled big data endpoint forensics investigation.

Includes members:
  Member "greening cloud enabled big data storage forensics syncany as a case study":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "emerging from the cloud a bibliometric analysis of cloud forensics studies")
  Member "forensic investigation of p2p cloud storage bittorrent sync as a case study":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "emerging from the cloud a bibliometric analysis of cloud forensics studies")
  Member "cloud storage forensics analysis of data remnants on spideroak justcloud and pcloud":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "emerging from the cloud a bibliometric analysis of cloud forensics studies")
  Member "digital forensic investigation of cloud storage services":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "greening cloud enabled big data storage forensics syncany as a case study")
  Member "windows instant messaging app forensics facebook and skype as case studies":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "greening cloud enabled big data storage forensics syncany as a case study")
  Member "a forensically sound adversary model for mobile devices":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "greening cloud enabled big data storage forensics syncany as a case study")
  Member "cloud storage forensic hubic as a case study":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "greening cloud enabled big data storage forensics syncany as a case study")
  Member "leveraging decentralization to extend the digital evidence acquisition window case study on bittorrent sync":
    also connected through other hyperedges:
      - Hyperedge HE-8 (induced by source paper "greening cloud enabled big data storage forensics syncany as a case study")

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)