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: "magneto covert channel between air gapped systems and nearby smartphones via cpu generated magnetic fields"
  Abstract: In this paper, we show that attackers can leak data from isolated, air-gapped computers to nearby smartphones via covert magnetic signals. The proposed covert channel works even if a smartphone is kept inside a Faraday shielding case, which aims to block any type of inbound and outbound wireless communication (Wi-Fi, cellular, Bluetooth, etc.). The channel also works if the smartphone is set in airplane mode in order to block any communication with the device. We implement a malware that controls the magnetic fields emanating from the computer by regulating workloads on the CPU cores. Sensitive data such as encryption keys, passwords, or keylogging data is encoded and transmitted over the magnetic signals. A smartphone located near the computer receives the covert signals with its magnetic sensor. We present technical background, and discuss signal generation, data encoding, and signal reception. We show that the proposed covert channel works from a user-level process, without requiring special privileges, and can successfully operate from within an isolated virtual machine (VM).

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"
    - "beatcoin leaking private keys from air gapped cryptocurrency wallets"
    - "oops i think i scanned a malware"
    - "air jumper covert air gap exfiltration infiltration via security cameras infrared ir"
    - "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 "brightness leaking sensitive data from air gapped workstations via screen brightness"):
  with members:
    - "ctrl alt led leaking data from air gapped computers via keyboard leds"
    - "data exfiltration via multipurpose rfid cards and countermeasures"
    - "optical tempest"
    - "powerhammer exfiltrating data from air gapped computers through power lines"
    - "usbee air gap covert channel via electromagnetic emission from usb"
    - "fansmitter acoustic data exfiltration from speakerless air gapped computers"
    - "visisploit an optical covert channel to leak data through an air gap"
    - "bitwhisper covert signaling channel between air gapped computers using thermal manipulations"

Connected through hyperedge HE-3 (induced by source paper "ctrl alt led leaking data from air gapped computers via keyboard leds"):
  with members:
    - "powerhammer exfiltrating data from air gapped computers through power lines"
    - "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-4 (induced by source paper "magneticspy exploiting magnetometer in mobile devices for website and application fingerprinting"):
  with members:
    - "stealing pins via mobile sensors actual risk versus user perception"
    - "robust website fingerprinting through the cache occupancy channel"
    - "perfweb how to violate web privacy with hardware performance events"
    - "a study on power side channels on mobile devices"

Connected through hyperedge HE-5 (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"
    - "mosquito covert ultrasonic transmissions between two air gapped computers using speaker to speaker communication"
    - "air jumper covert air gap exfiltration infiltration via security cameras infrared ir"
    - "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-6 (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"
    - "mosquito covert ultrasonic transmissions between two air gapped computers using speaker to speaker communication"
    - "air jumper covert air gap exfiltration infiltration via security cameras infrared ir"
    - "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-7 (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"
    - "air jumper covert air gap exfiltration infiltration via security cameras infrared ir"
    - "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-8 (induced by source paper "optical tempest"):
  with members:
    - "powerhammer exfiltrating data from air gapped computers through power lines"
    - "oops i think i scanned a malware"
    - "air jumper covert air gap exfiltration infiltration via security cameras infrared ir"
    - "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)