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 "brightness leaking sensitive data from air gapped workstations via screen brightness"):
  Abstract: Air-gapped computers are systems that are kept isolated from the Internet since they store or process sensitive information. In this paper, we introduce an optical covert channel in which an attacker can leak (or, exfiltlrate) sensitive information from air-gapped computers through manipulations on the screen brightness. This covert channel is invisible and it works even while the user is working on the computer. Malware on a compromised computer can obtain sensitive data (e.g., files, images, encryption keys and passwords), and modulate it within the screen brightness, invisible to users. The small changes in the brightness are invisible to humans but can be recovered from video streams taken by cameras such as a local security camera, smartphone camera or a webcam. We present related work and discuss the technical and scientific background of this covert channel. We examined the channel's boundaries under various parameters, with different types of computer and TV screens, and at several distances. We also tested different types of camera receivers to demonstrate the covert channel. Lastly, we present relevant countermeasures to this type of attack.

Includes members:
  Member "ctrl alt led leaking data from air gapped computers via keyboard leds":
    also connected through other hyperedges:
      (none)
  Member "data exfiltration via multipurpose rfid cards and countermeasures":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "powerhammer exfiltrating data from air gapped computers through power lines")
  Member "optical tempest":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "oops had the silly thing in reverse optical injection attacks in through led status indicators")
  Member "powerhammer exfiltrating data from air gapped computers through power lines":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "oops had the silly thing in reverse optical injection attacks in through led status indicators")
  Member "magneto covert channel between air gapped systems and nearby smartphones via cpu generated magnetic fields":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "oops had the silly thing in reverse optical injection attacks in through led status indicators")
  Member "usbee air gap covert channel via electromagnetic emission from usb":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "oops had the silly thing in reverse optical injection attacks in through led status indicators")
  Member "fansmitter acoustic data exfiltration from speakerless air gapped computers":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "your noise my signal exploiting switching noise for stealthy data exfiltration from desktop computers")
  Member "visisploit an optical covert channel to leak data through an air gap":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "oops had the silly thing in reverse optical injection attacks in through led status indicators")

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)