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 "private web browser forensics a case study of the epic privacy browser"):
  Abstract: Organised crime, as well as individual criminals, is benefiting from the protection of private browsers provide to those who would carry out illegal activity, such as money laundering, drug trafficking, the online exchange of child-abuse material, etc. The protection afforded to users of the Epic Privacy Browser illustrates these benefits. This browser is currently in use in approximately 180 countries worldwide. This paper outlines the location and type of evidence available through live and post-mortem state analyses of the Epic Privacy Browser. This study identifies the manner in which the browser functions during use, where evidence can be recovered after use, as well as the tools and effective presentation of the recovered material.

Includes members:
  Member "forensic analysis of epic privacy browser on windows operating systems":
    also connected through other hyperedges:
      (none)
  Member "tiered forensic methodology model for digital field triage by non digital evidence specialists":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "methodology for the automated metadata based classification of incriminating digital forensic artefacts")
  Member "forensics acquisition and analysis of instant messaging and voip applications":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "privacy preserving internet browsers forensic analysis of browzar")
  Member "project maelstrom forensic analysis of the bittorrent powered browser":
    also connected through other hyperedges:
      (none)
  Member "network investigation methodology for bittorrent sync":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "forensic investigation of p2p cloud storage bittorrent sync 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)