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: "topological chaos and chaotic iterations application to hash functions"
  Abstract: This paper introduces a new notion of chaotic algorithms. These algorithms are iterative and are based on so-called chaotic iterations. Contrary to all existing studies on chaotic iterations, we are not interested in stable states of such iterations but in their possible unpredictable behaviors. By establishing a link between chaotic iterations and the notion of Devaney's topological chaos, we give conditions ensuring that these kind of algorithms produce topological chaos. This leads to algorithms that are highly unpredictable. After presenting the theoretical foundations of our approach, we are interested in its practical aspects. We show how the theoretical algorithms give rise to computer programs that produce true topological chaos, then we propose applications in the area of information security.

Connected through hyperedge HE-1 (induced by source paper "an optimization technique on pseudorandom generators based on chaotic iterations"):
  with members:
    - "a new chaos based watermarking algorithm"
    - "class of trustworthy pseudo random number generators"
    - "improving random number generators by chaotic iterations application in data hiding"
    - "a pseudo random numbers generator based on chaotic iterations application to watermarking"

Connected through hyperedge HE-2 (induced by source paper "low cost monitoring and intruders detection using wireless video sensor networks"):
  with members:
    - "hash functions using chaotic iterations"
    - "chaotic iterations versus spread spectrum chaos and stego security"
    - "a pseudo random numbers generator based on chaotic iterations application to watermarking"

Connected through hyperedge HE-3 (induced by source paper "lyapunov exponent evaluation of the cbc mode of operation"):
  with members:
    - "hash functions using chaotic iterations"
    - "evaluating quality of chaotic pseudo random generators application to information hiding"

Connected through hyperedge HE-4 (induced by source paper "an improved watermarking scheme for internet applications"):
  with members:
    - "a new chaos based watermarking algorithm"

Connected through hyperedge HE-5 (induced by source paper "fpga design for pseudorandom number generator based on chaotic iteration used in information hiding application"):
  with members:
    - "hash functions using chaotic iterations"
    - "an optimization technique on pseudorandom generators based on chaotic iterations"
    - "a new chaos based watermarking algorithm"
    - "steganography a class of secure and robust algorithms"
    - "evaluating quality of chaotic pseudo random generators application to information hiding"
    - "chaotic iterations versus spread spectrum chaos and stego security"

Connected through hyperedge HE-6 (induced by source paper "lyapunov exponent evaluation of a digital watermarking scheme proven to be secure"):
  with members:
    - "steganography a class of algorithms having secure properties"
    - "chaotic iterations versus spread spectrum chaos and stego security"

Connected through hyperedge HE-7 (induced by source paper "building a chaotic proved neural network"):
  with members:
    - "hash functions using chaotic iterations"
    - "randomness quality of ci chaotic generators applications to internet security"
    - "improving random number generators by chaotic iterations application in data hiding"

Connected through hyperedge HE-8 (induced by source paper "evaluating quality of chaotic pseudo random generators application to information hiding"):
  with members:
    - "randomness quality of ci chaotic generators applications to internet security"
    - "chaotic iterations versus spread spectrum chaos and stego security"
    - "a novel pseudo random number generator based on discrete chaotic iterations"

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)