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 "brokenstrokes on the in security of wireless keyboards"):
  Abstract: Wireless devices resorting to event-triggered communications have been proved to suffer critical privacy issues, due to the intrinsic leakage associated with radio frequency emissions. In this paper, we move the attack frontier forward by proposing BrokenStrokes: an inexpensive, easy to implement, efficient, and effective attack able to detect the typing of a predefined keyword by only eavesdropping the communication channel used by the wireless keyboard. BrokenStrokes achieves its goal when the eavesdropping antenna is up to 15 meters from the target keyboard. We prove the attack succeeds regardless of the encryption scheme, the communication protocol, the presence of radio noise, and the presence of physical obstacles. We tested BrokenStrokes in three real scenarios (close to the keyboard--e.g., the eavesdropping device is concealed under the desk--, wall separation-- eavesdropping from next office--, and eavesdropping from the public street--into the house of one of the co-authors), under the following conditions: presence of radio noise, testing arbitrary long keystroke sequences, and varying several system parameters. Performance are striking: BrokenStrokes detects the presence of a keyword among the user's keystrokes in 90% of cases when the eavesdropping antenna is placed in the proximity of the keyboard (up to 20 cm), while it guarantees at least 73% success rate when the eavesdropping antenna is up to 15 meters far away from the target. We discuss the rationale for the attack, its logical flow, and we detail the experimental setting and the algorithmic machinery adopted. Finally, we discuss potential countermeasures and sketch some future research directions. The data utilized in this paper have been released as open-source to allow practitioners, industries, and academia to verify our claims and use them as a basis for further developments.

Includes members:
  Member "i send therefore i leak information leakage in low power wide area networks":
    also connected through other hyperedges:
      (none)
  Member "software defined radios architecture state of the art and challenges":
    also connected through other hyperedges:
      (none)
  Member "loophole timing attacks on shared event loops in chrome":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "revisiting and evaluating software side channel vulnerabilities and countermeasures in cryptographic applications")
  Member "keydrown eliminating keystroke timing side channel attacks":
    also connected through other hyperedges:
      (none)
  Member "don t skype type acoustic eavesdropping in voice over ip":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "short range audio channels security survey of mechanisms applications and research challenges")
  Member "flush flush a fast and stealthy cache attack":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "copycat controlled instruction level attacks on enclaves for maximal key extraction")
  Member "a survey on wireless security technical challenges recent advances and future trends":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "physical layer security in the finite blocklength regime over fading channels")
  Member "flush flush a fast and stealthy cache attack":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "copycat controlled instruction level attacks on enclaves for maximal key extraction")

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)