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 "resource requirements and speed versus geometry of unconditionally secure physical key exchanges"):
  Abstract: The imperative need for unconditional secure key exchange is expounded by the increasing connectivity of networks and by the increasing number and level of sophistication of cyberattacks. Two concepts that are theoretically information-secure are quantum key distribution (QKD) and Kirchoff-Law-Johnson-Noise (KLJN). However, these concepts require a dedicated connection between hosts in peer-to-peer (P2P) networks which can be impractical and or cost prohibitive. A practical and cost effective method is to have each host share their respective cable(s) with other hosts such that two remote hosts can realize a secure key exchange without the need of an additional cable or key exchanger. In this article we analyze the cost complexities of cable, key exchangers, and time required in the star network. We mentioned the reliability of the star network and compare it with other network geometries. We also conceived a protocol and equation for the number of secure bit exchange periods needed in a star network. We then outline other network geometries and trade-off possibilities that seem interesting to explore.

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 "on kljn based secure key distribution in vehicular communication networks":
    also connected through other hyperedges:
      - Hyperedge HE-2 (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-3 (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-4 (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-5 (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-6 (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-7 (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-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)