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 "generalized kirchhoff law johnson noise kljn secure key exchange system using arbitrary resistors"):
  Abstract: The Kirchhoff-Law-Johnson-Noise (KLJN) secure key exchange system has been introduced as a simple, very low cost and efficient classical physical alternative to quantum key distribution systems. The ideal system uses only a few electronic components—identical resistor pairs, switches and interconnecting wires—in order to guarantee perfectly protected data transmission. We show that a generalized KLJN system can provide unconditional security even if it is used with significantly less limitations. The more universal conditions ease practical realizations considerably and support more robust protection against attacks. Our theoretical results are confirmed by numerical simulations.

Includes members:
  Member "analysis of an attenuator artifact in an experimental attack by gunn allison abbott against the kirchhoff law johnson noise kljn secure key exchange system":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "generalized dc loop current attack against the kljn secure key exchange scheme")
  Member "what kind of noise guarantees security for the kirchhoff law johnson noise key exchange":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "random resistor random temperature kirchhoff law johnson noise rrrt kljn key exchange")
  Member "on the security of the kirchhoff law johnson noise kljn communicator":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "generalized dc loop current attack against the kljn secure key exchange scheme")
  Member "securing vehicle communication systems by the kljn key exchange protocol":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "generalized dc loop current attack against the kljn secure key exchange scheme")
  Member "noise properties in the ideal kirchhoff law johnson noise secure communication system":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "random resistor random temperature kirchhoff law johnson noise rrrt kljn key exchange")
  Member "on the cracking scheme in the paper a directional coupler attack against the kish key distribution system by gunn allison and abbott":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "generalized dc loop current attack against the kljn secure key exchange scheme")
  Member "elimination of a second law attack and all cable resistance based attacks in the kirchhoff law johnson noise kljn secure key exchange system":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "generalized dc loop current attack against the kljn secure key exchange scheme")
  Member "information theoretically secure enhanced johnson noise based key distribution over the smart grid with switched filters":
    also connected through other hyperedges:
      - Hyperedge HE-8 (induced by source paper "generalized dc loop current attack against the kljn secure key exchange scheme")

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)