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 "on the cracking scheme in the paper a directional coupler attack against the kish key distribution system by gunn allison and abbott"):
  Abstract: Recently, Gunn, Allison and Abbott (GAA) [http://arxiv.org/pdf/1402.2709v2.pdf] proposed a new scheme to utilize electromagnetic waves for eavesdropping on the Kirchhoff -law –Johnson- noise (KLJN) secure key distribution. We proved in a former paper [ Fluct. Noise Lett. 13 (2014) 1450016 ] that GAA’s mathematical model is unphysical. Here we analyze GAA’s cracking scheme and show that, in the case of a loss -free cable, it provides less eavesdropping information than in the earlier (Bergou)-Scheuer-Yariv mean-square- based attack [Kish LB, Scheuer J, Phys. Lett. A 37 4:2140 –2142 (2010)], while it offers no information in the case of a lossy cable. We also investigate GAA’s claim to be experimentally capable of distinguishing —using statistics over a few correlation times only —the distributions of two Gaussian noises wit h a relative variance difference of less than 10 –8 . Normally such distinctions would require hundreds of millions of correlations times to be observable. We identify several potential experimental artifacts as results of poor KLJN design, which can lead to GAA’s assertions: deterministic currents due to spurious harmonic components caused by ground loops, DC offset, aliasing, non -Gaussian features including non-linearities and other non- idealities in generators, and the timederivative nature of GAA’s schem e which tends to enhance all of these artifacts.

Includes members:
  Member "what kind of noise guarantees security for the kirchhoff law johnson noise key exchange":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "random resistor random temperature kirchhoff law johnson noise rrrt kljn key exchange")
  Member "noise properties in the ideal kirchhoff law johnson noise secure communication system":
    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 "do electromagnetic waves exist in a short cable at low frequencies what does physics say":
    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 "a directional coupler attack against the kish key distribution system":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "resource requirements and speed versus geometry of unconditionally secure physical key exchanges")
  Member "enhanced secure key exchange systems based on the johnson noise scheme":
    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 "critical analysis of the bennett riedel attack on secure cryptographic key distributions via the kirchhoff law johnson noise scheme":
    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 "effective privacy amplification for secure classical communications":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "comments on a new transient attack on the kish key distribution system")

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)