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: "the number theoretic hilbert transform"
  Abstract: This paper presents a general expression for a number-theoretic Hilbert transform (NHT). The transformations preserve the circulant nature of the discrete Hilbert transform (DHT) matrix together with alternating values in each row being zero and non-zero. Specific examples for 4-point, 6-point, and 8-point NHT are provided. The NHT transformation can be used as a primitive to create cryptographically useful scrambling transformations.

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"
    - "random residue sequences and the number theoretic hilbert transform"
    - "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"

Connected through hyperedge HE-2 (induced by source paper "memory capacity of neural networks using a circulant weight matrix"):
  with members:
    - "new results on the number theoretic hilbert transform"
    - "the 10 point and 12 point number theoretic hilbert transform"
    - "neural network capacity for multilevel inputs"
    - "artificial and biological intelligence"

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

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

Connected through hyperedge HE-5 (induced by source paper "random residue sequences and the number theoretic hilbert transform"):
  with members:
    - "new results on the number theoretic hilbert transform"
    - "the 10 point and 12 point number theoretic hilbert transform"
    - "the basic discrete hilbert transform with an information hiding application"
    - "watermarking using decimal sequences"

Connected through hyperedge HE-6 (induced by source paper "new results on the number theoretic hilbert transform"):
  with members:
    - "the 10 point and 12 point number theoretic hilbert transform"
    - "the basic discrete hilbert transform with an information hiding application"
    - "towards a number theoretic discrete hilbert transform"

Connected through hyperedge HE-7 (induced by source paper "a class of orthogonal sequences"):
  with members:
    - "new results on the number theoretic hilbert transform"
    - "the basic discrete hilbert transform with an information hiding application"

Connected through hyperedge HE-8 (induced by source paper "the 10 point and 12 point number theoretic hilbert transform"):
  with members:
    - "the basic discrete hilbert transform with an information hiding application"
    - "towards a number theoretic discrete hilbert transform"

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)