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: "a chaotic image encryption scheme owning temp value feedback"
  Abstract: Abstract   Many round-based chaotic image encryption algorithms employ the permutation–diffusion structure. This structure has been found insecure when the iteration round is equal to one and the secret permutation of some existing schemes can be recovered even a higher round is adopted. In this paper, we present a single round permutation–diffusion chaotic cipher for gray image, in which some temp-value feedback mechanisms are introduced to resist the known attacks. Specifically, we firstly embed the plaintext feedback technique in the permutation process to develop different permutation sequences for different plain-images and then employ plaintext/ciphertext feedback for diffusion to generate equivalent secret key dynamically. Experimental results show that the new scheme owns large key space and can resist the differential attack. It is also efficient.

Connected through hyperedge HE-1 (induced by source paper "on the security of a class of diffusion mechanisms for image encryption"):
  with members:
    - "chosen plaintext attack of an image encryption scheme based on modified permutation diffusion structure"
    - "local shannon entropy measure with statistical tests for image randomness"
    - "breaking a chaotic image encryption algorithm based on modulo addition and xor operation"
    - "a general quantitative cryptanalysis of permutation only multimedia ciphers against plaintext attacks"
    - "on the design of perceptual mpeg video encryption algorithms"
    - "a fast image encryption scheme based on chaotic standard map"

Connected through hyperedge HE-2 (induced by source paper "chosen plaintext attack of an image encryption scheme based on modified permutation diffusion structure"):
  with members:
    - "cryptanalyzing an image encryption algorithm based on scrambling and veginere cipher"
    - "breaking a chaotic image encryption algorithm based on modulo addition and xor operation"
    - "breaking an image encryption algorithm based on chaos"
    - "a fast image encryption scheme based on chaotic standard map"

Connected through hyperedge HE-3 (induced by source paper "cryptanalyzing an image encryption algorithm based on scrambling and veginere cipher"):
  with members:
    - "a general quantitative cryptanalysis of permutation only multimedia ciphers against plaintext attacks"
    - "on the design of perceptual mpeg video encryption algorithms"

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)