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: "trace representation of pseudorandom binary sequences derived from euler quotients"
  Abstract: We give the trace representation of a family of binary sequences derived from Euler quotients by determining the corresponding defining polynomials. Trace representation can help us producing the sequences efficiently and analyzing their cryptographic properties, such as linear complexity.

Connected through hyperedge HE-1 (induced by source paper "linear complexity of a family of binary pq 2 periodic sequences from euler quotients"):
  with members:
    - "on k error linear complexity of pseudorandom binary sequences derived from euler quotients"
    - "new quaternary sequences of even length with optimal auto correlation"
    - "on the k error linear complexity of binary sequences derived from polynomial quotients"

Connected through hyperedge HE-2 (induced by source paper "on k error linear complexity of binary sequences derived from euler quotients modulo 2p"):
  with members:
    - "on k error linear complexity of pseudorandom binary sequences derived from euler quotients"

Connected through hyperedge HE-3 (induced by source paper "on k error linear complexity of pseudorandom binary sequences derived from euler quotients"):
  with members:
    - "on the k error linear complexity of binary sequences derived from polynomial quotients"

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)