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 "on security research towards future mobile network generations"):
  Abstract: Over the last decades, numerous security and privacy issues in all three active mobile network generations have been revealed that threaten users as well as network providers. In view of the newest generation (5G) currently under development, we now have the unique opportunity to identify research directions for the next generation based on existing security and privacy issues as well as already proposed defenses. This paper aims to unify security knowledge on mobile phone networks into a comprehensive overview and to derive pressing open research questions. To achieve this systematically, we develop a methodology that categorizes known attacks by their aim, proposed defenses, underlying causes, and root causes. Further, we assess the impact and the efficacy of each attack and defense. We then apply this methodology to existing literature on attacks and defenses in all three network generations. By doing so, we identify ten causes and four root causes of attacks. Mapping the attacks to proposed defenses and suggestions for the 5G specification enables us to uncover open research questions and challenges for the development of next-generation mobile networks. The problems of unsecured pre-authentication traffic and jamming attacks exist across all three mobile generations. They should be addressed in the future, in particular, to wipe out the class of downgrade attacks and, thereby, strengthen the users' privacy. Further advances are needed in the areas of inter-operator protocols as well as secure baseband implementations. Additionally, mitigations against denial-of-service attacks by smart protocol design represent an open research question.

Includes members:
  Member "lte phy layer vulnerability analysis and testing using open source sdr tools":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "csai open source cellular radio access network security analysis instrument")
  Member "control flow integrity precision security and performance":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "methodologies for quantifying re randomization security and timing under jit rop")
  Member "lte security protocol exploits and location tracking experimentation with low cost software radio":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "the current state of affairs in 5g security and the main remaining security challenges")
  Member "srslte an open source platform for lte evolution and experimentation":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "pbe cc congestion control via endpoint centric physical layer bandwidth measurements")
  Member "retrofitting mutual authentication to gsm using rand hijacking":
    also connected through other hyperedges:
      (none)
  Member "practical attacks against privacy and availability in 4g lte mobile communication systems":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "the current state of affairs in 5g security and the main remaining security challenges")
  Member "improving air interface user privacy in mobile telephony":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "defeating the downgrade attack on identity privacy in 5g")
  Member "vulnerability of lte to hostile interference":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "5g nr jamming spoofing and sniffing threat assessment and mitigation")

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)