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 "binary random sequences obtained from decimal sequences"):
  Abstract: This paper presents a twist to the generation of binary random sequences by starting with decimal sequences. Rather than representing the prime reciprocal sequence directly in base 2, we first right the prime reciprocal in base 10 and then convert it into the binary form. The autocorrelation and cross-correlation properties of these binary random (BRD) sequences are discussed.

Includes members:
  Member "testing kak s conjecture on binary reciprocal of primes and cryptographic applications":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "analysis of prime reciprocal sequences in base 10")
  Member "testing d sequences for their randomness":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "new class of pseudorandom d sequences to generate cryptographic keys")
  Member "period of the d sequence based random number generator":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "analysis of prime reciprocal sequences in base 10")
  Member "the cubic public key transformation":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "generating target probability sequences and events")
  Member "a d sequence based recursive random number generator":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "analysis of prime reciprocal sequences in base 10")
  Member "watermarking using decimal sequences":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "a class of random sequences for key generation")

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)