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 "optical tempest"):
  Abstract: Research on optical TEMPEST has moved forward since 2002 when the first pair of papers on the subject emerged independently and from widely separated locations in the world within a week of each other. Since that time, vulnerabilities have evolved along with systems, and several new threat vectors have consequently appeared. Although the supply chain ecosystem of Ethernet has reduced the vulnerability of billions of devices through use of standardised PHY solutions, other recent trends including the Internet of Things (IoT) in both industrial settings and the general population, High Frequency Trading (HFT) in the financial sector, the European General Data Protection Regulation (GDPR), and inexpensive drones have made it relevant again for consideration in the design of new products for privacy. One of the general principles of security is that vulnerabilities, once fixed, sometimes do not stay that way.

Includes members:
  Member "powerhammer exfiltrating data from air gapped computers through power lines":
    also connected through other hyperedges:
      - Hyperedge HE-1 (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-2 (induced by source paper "oops had the silly thing in reverse optical injection attacks in through led status indicators")
  Member "oops i think i scanned a malware":
    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 "air jumper covert air gap exfiltration infiltration via security cameras infrared ir":
    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 "xled covert data exfiltration from air gapped networks via router leds":
    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 "visisploit an optical covert channel to leak data through an air gap":
    also connected through other hyperedges:
      - Hyperedge HE-6 (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)