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 "random sequences from primitive pythagorean triples"):
  Abstract: This paper shows that the six classes of PPTs can be put into two groups. Autocorrelation and cross-correlation functions of the six classes derived from the gaps between each class type have been computed. It is shown that Classes A and D (in which the largest term is divisible by 5) are different from the other four classes in their randomness properties if they are ordered by the largest term. In the other two orderings each of the six random Baudhayana sequences has excellent randomness properties.

Includes members:
  Member "random sequences based on the divisor pairs function":
    also connected through other hyperedges:
      (none)
  Member "goldbach circles and balloons and their cross correlation":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "random sequences based on the divisor pairs function")
  Member "new results on scrambling using the mesh array":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "cryptographic hardening of d sequences")
  Member "on the mesh array for matrix multiplication":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "efficiency of matrix multiplication on the cross wired mesh array")
  Member "pythagorean triples and cryptographic coding":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "residue classes of the ppt sequence")
  Member "analysis of prime reciprocal sequences in base 10":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "goldbach circles and balloons and their cross correlation")

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)