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: "bitwhisper covert signaling channel between air gapped computers using thermal manipulations"
  Abstract: It has been assumed that the physical separation (air-gap) of computers provides a reliable level of security, such that should two adjacent computers become compromised, the covert exchange of data between them would be impossible. In this paper, we demonstrate BitWhisper, a method of bridging the air-gap between adjacent compromised computers by using their heat emissions and built-in thermal sensors to create a covert communication channel. Our method is unique in two respects: it supports bidirectional communication, and it requires no additional dedicated peripheral hardware. We provide experimental results based on implementation of BitWhisper prototype, and examine the channel properties and limitations. Our experiments included different layouts, with computers positioned at varying distances from one another, and several sensor types and CPU configurations (e.g., Virtual Machines). We also discuss signal modulation and communication protocols, showing how BitWhisper can be used for the exchange of data between two computers in a close proximity (at distance of 0-40cm) at an effective rate of 1-8 bits per hour, a rate which makes it possible to infiltrate brief commands and exfiltrate small amount of data (e.g., passwords) over the covert channel.

Connected through hyperedge HE-1 (induced by source paper "your noise my signal exploiting switching noise for stealthy data exfiltration from desktop computers"):
  with members:
    - "high efficiency power side channel attack immunity using noise injection in attenuated signature domain"
    - "no free charge theorem a covert channel via usb charging cable on mobile devices"
    - "state of the art in power line communications from the applications to the medium"
    - "fansmitter acoustic data exfiltration from speakerless air gapped computers"
    - "on covert acoustical mesh networks in air"

Connected through hyperedge HE-2 (induced by source paper "covert association of applications on edge devices by processor workload"):
  with members:
    - "android inter app communication threats and detection techniques"
    - "drama exploiting dram addressing for cross cpu attacks"
    - "thermal covert channels on multi core platforms"
    - "mobile device identification via sensor fingerprinting"

Connected through hyperedge HE-3 (induced by source paper "context leakage free transient execution"):
  with members:
    - "fallout reading kernel writes from user space"
    - "spectre is here to stay an analysis of side channels and speculative execution"
    - "store to leak forwarding leaking data on meltdown resistant cpus"
    - "zombieload cross privilege boundary data sampling"
    - "speculative buffer overflows attacks and defenses"
    - "netspectre read arbitrary memory over network"
    - "safespec banishing the spectre of a meltdown with leakage free speculation"
    - "meltdownprime and spectreprime automatically synthesized attacks exploiting invalidation based coherence protocols"

Connected through hyperedge HE-4 (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"
    - "air jumper covert air gap exfiltration infiltration via security cameras infrared ir"
    - "xled covert data exfiltration from air gapped networks via router leds"

Connected through hyperedge HE-5 (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"
    - "magneto covert channel between air gapped systems and nearby smartphones via cpu generated magnetic fields"
    - "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"

Connected through hyperedge HE-6 (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"
    - "magneto covert channel between air gapped systems and nearby smartphones via cpu generated magnetic fields"
    - "usbee air gap covert channel via electromagnetic emission from usb"
    - "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-7 (induced by source paper "mice and covert channels"):
  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"
    - "visisploit an optical covert channel to leak data through an air gap"

Connected through hyperedge HE-8 (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"
    - "air jumper covert air gap exfiltration infiltration via security cameras infrared ir"
    - "xled covert data exfiltration from air gapped networks via router leds"

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)