human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "air jumper covert air gap exfiltration infiltration via security cameras infrared ir"
  Abstract: Infrared (IR) light is invisible to humans, but cameras are optically sensitive to this type of light. #R##N#In this paper, we show how attackers can use surveillance cameras and infrared light to establish bi-directional covert communication between the internal networks of organizations and remote attackers. We present two scenarios: exfiltration (leaking data out of the network) and infiltration (sending data into the network). Exfiltration. Surveillance and security cameras are equipped with IR LEDs, which are used for night vision. In the exfiltration scenario, malware within the organization access the surveillance cameras across the local network and controls the IR illumination. Sensitive data such as PIN codes, passwords, and encryption keys are then modulated, encoded, and transmitted over the IR signals. Infiltration. In an infiltration scenario, an attacker standing in a public area (e.g., in the street) uses IR LEDs to transmit hidden signals to the surveillance camera(s). Binary data such as command and control (C&C) and beacon messages are encoded on top of the IR signals. The exfiltration and infiltration can be combined to establish bidirectional, 'air-gap' communication between the compromised network and the attacker. We discuss related work and provide scientific background about this optical channel. We implement a malware prototype and present data modulation schemas and a basic transmission protocol. Our evaluation of the covert channel shows that data can be covertly exfiltrated from an organization at a rate of 20 bit/sec per surveillance camera to a distance of tens of meters away. Data can be covertly infiltrated into an organization at a rate of over 100 bit/sec per surveillance camera from a distance of hundreds of meters to kilometers away.

Connected through hyperedge HE-1 (induced by source paper "oops had the silly thing in reverse optical injection attacks in through led status indicators"):
  with members:
    - "synesthesia detecting screen content via remote acoustic side channels"
    - "optical tempest"
    - "powerhammer exfiltrating data from air gapped computers through power lines"
    - "magneto covert channel between air gapped systems and nearby smartphones via cpu generated magnetic fields"
    - "beatcoin leaking private keys from air gapped cryptocurrency wallets"
    - "oops i think i scanned a malware"
    - "xled covert data exfiltration from air gapped networks via router leds"
    - "usbee air gap covert channel via electromagnetic emission from usb"

Connected through hyperedge HE-2 (induced by source paper "powerhammer exfiltrating data from air gapped computers through power lines"):
  with members:
    - "data exfiltration via multipurpose rfid cards and countermeasures"
    - "optical exfiltration of data via keyboard led status indicators to ip cameras"
    - "optical tempest"
    - "odini escaping sensitive data from faraday caged air gapped computers via magnetic fields"
    - "magneto covert channel between air gapped systems and nearby smartphones via cpu generated magnetic fields"
    - "mosquito covert ultrasonic transmissions between two air gapped computers using speaker to speaker communication"
    - "xled covert data exfiltration from air gapped networks via router leds"
    - "usbee air gap covert channel via electromagnetic emission from usb"

Connected through hyperedge HE-3 (induced by source paper "beatcoin leaking private keys from air gapped cryptocurrency wallets"):
  with members:
    - "spectre attacks exploiting speculative execution"
    - "powerhammer exfiltrating data from air gapped computers through power lines"
    - "odini escaping sensitive data from faraday caged air gapped computers via magnetic fields"
    - "magneto covert channel between air gapped systems and nearby smartphones via cpu generated magnetic fields"
    - "mosquito covert ultrasonic transmissions between two air gapped computers using speaker to speaker communication"
    - "xled covert data exfiltration from air gapped networks via router leds"
    - "usbee air gap covert channel via electromagnetic emission from usb"
    - "fansmitter acoustic data exfiltration from speakerless air gapped computers"

Connected through hyperedge HE-4 (induced by source paper "odini escaping sensitive data from faraday caged air gapped computers via magnetic fields"):
  with members:
    - "xled covert data exfiltration from air gapped networks via router leds"
    - "usbee air gap covert channel via electromagnetic emission from usb"
    - "fansmitter acoustic data exfiltration from speakerless air gapped computers"
    - "bitwhisper covert signaling channel between air gapped computers using thermal manipulations"
    - "on covert acoustical mesh networks in air"
    - "airhopper bridging the air gap between isolated networks and mobile phones using radio frequencies"

Connected through hyperedge HE-5 (induced by source paper "mosquito covert ultrasonic transmissions between two air gapped computers using speaker to speaker communication"):
  with members:
    - "odini escaping sensitive data from faraday caged air gapped computers via magnetic fields"
    - "magneto covert channel between air gapped systems and nearby smartphones via cpu generated magnetic fields"
    - "xled covert data exfiltration from air gapped networks via router leds"
    - "fansmitter acoustic data exfiltration from speakerless air gapped computers"
    - "on covert acoustical mesh networks in air"
    - "airhopper bridging the air gap between isolated networks and mobile phones using radio frequencies"

Connected through hyperedge HE-6 (induced by source paper "light ears information leakage via smart lights"):
  with members:
    - "irexf data exfiltration from air gapped networks by infrared remote control signals"
    - "side channel inference attacks on mobile keypads using smartwatches"
    - "towards inferring mechanical lock combinations using wrist wearables as a side channel"
    - "don t skype type acoustic eavesdropping in voice over ip"
    - "powerspy location tracking using mobile device power analysis"

Connected through hyperedge HE-7 (induced by source paper "optical tempest"):
  with members:
    - "powerhammer exfiltrating data from air gapped computers through power lines"
    - "magneto covert channel between air gapped systems and nearby smartphones via cpu generated magnetic fields"
    - "oops i think i scanned a malware"
    - "xled covert data exfiltration from air gapped networks via router leds"
    - "visisploit an optical covert channel to leak data through an air gap"

Question: Please tell me which class the center node 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)