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 "fridges on the highway road traffic poisoning of navigation apps"):
  Abstract: Assisted navigation software apps have a relevant impact on our daily life. Such apps infer the current state of roads mainly relying on the information provided by the devices they are running over. However, technological progress in two independent fields, i.e., mobile phone virtualization and Software Defined Radios, has enabled brand new types of attacks. It is nowadays possible to create fake queues of vehicles wherever in the world, as well as to make a congested street look like the best path to speed your travel. We refer to the aforementioned attacks as road traffic poisoning. These attacks open up several dreadful scenarios, where users can be maliciously re-routed by creating congestion in target positions, or to have users choose a given path since it is allegedly free from traffic, in both cases possibly affecting people's safety. In this paper, we analyze several scenarios, and discuss different adversary models, tools, and related attacks. We also propose a few novel countermeasures that could be adopted to mitigate the above threats, their limitations, and the open issues ahead.

Includes members:
  Member "vulnerability analysis of smart grids to gps spoofing":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "real time rejection and mitigation of time synchronization attacks on the global positioning system")
  Member "quality of information in mobile crowdsensing survey and research challenges":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "a novel methodology for designing policies in mobile crowdsensing systems")

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)