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: "random residue sequences and the number theoretic hilbert transform"
  Abstract: This paper presents random residue sequences derived from the number theoretic Hilbert (NHT) transform and their correlation properties. The autocorrelation of a NHT derived sequence is zero for all non-zero shifts which illustrates that these are self-orthogonal sequences. The cross correlation function between two sequences may be computed with respect to the moduli of the either sequence. There appears to be some kind of an inverse qualitative relationship between these two different computations for many sets of residue sequences.

Connected through hyperedge HE-1 (induced by source paper "a new result on the random residue sequence algorithm"):
  with members:
    - "a wireless system using random residue sequences"
    - "new results on the number theoretic hilbert transform"
    - "a class of orthogonal sequences"
    - "the 10 point and 12 point number theoretic hilbert transform"
    - "randomness of d sequences via diehard testing"
    - "the number theoretic hilbert transform"

Connected through hyperedge HE-2 (induced by source paper "survey of key distribution schemes for wireless sensor networks"):
  with members:
    - "a key set cipher for wireless sensor networks"
    - "the piggy bank cryptographic trope"
    - "randomness of d sequences via diehard testing"
    - "watermarking using decimal sequences"

Connected through hyperedge HE-3 (induced by source paper "a wireless system using random residue sequences"):
  with members:
    - "a key set cipher for wireless sensor networks"
    - "randomness of d sequences via diehard testing"
    - "the number theoretic hilbert transform"
    - "watermarking using decimal sequences"

Connected through hyperedge HE-4 (induced by source paper "a key set cipher for wireless sensor networks"):
  with members:
    - "new results on the number theoretic hilbert transform"
    - "a class of orthogonal sequences"
    - "the 10 point and 12 point number theoretic hilbert transform"
    - "the number theoretic hilbert transform"
    - "the basic discrete hilbert transform with an information hiding application"

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)