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: "cracking a hierarchical chaotic image encryption algorithm based on permutation"
  Abstract: In year 2000, an efficient hierarchical chaotic image encryption (HCIE) algorithm was proposed, which divides a plain-image of size M × N with T possible value levels into K blocks of the same size and then operates position permutation on two levels: intra-block and inter-block. As a typical position permutation-only encryption algorithm, it has received intensive attention. The present paper analyzes specific security performance of HCIE against ciphertext-only attack and known/chosen-plaintext attack. It is found that only O ( ? log T ( M ? N / K ) ? ) known/chosen plain-images are sufficient to achieve a good performance, and the computational complexity is O ( M ? N ? ? log T ( M ? N / K ) ? ) , which effectively demonstrates that hierarchical permutation-only image encryption algorithms are less secure than normal (i.e., non-hierarchical) ones. Detailed experiment results are given to verify the feasibility of the known-plaintext attack. In addition, it is pointed out that the security of HCIE against ciphertext-only attack was much overestimated. HighlightsSecurity performance of an encryption algorithm called HCIE is analyzed in detail.Hierarchical permutation-only encryption schemes are less secure than normal ones.Security of HCIE against ciphertext-only attack was reported being overestimated.

Connected through hyperedge HE-1 (induced by source paper "when an attacker meets a cipher image in 2018 a year in review"):
  with members:
    - "dynamic analysis of digital chaotic maps via state mapping networks"
    - "cryptanalysis of a chaotic image encryption algorithm based on information entropy"
    - "security evaluation for block scrambling based image encryption including jpeg distortion against jigsaw puzzle solver attacks"
    - "cryptanalyzing an image scrambling encryption algorithm of pixel bits"
    - "on the cryptanalysis of fridrich s chaotic image encryption scheme"
    - "cryptanalyzing an image encryption algorithm based on autoblocking and electrocardiography"

Connected through hyperedge HE-2 (induced by source paper "cryptanalysis of an image block encryption algorithm based on chaotic maps"):
  with members:
    - "dynamic analysis of digital chaotic maps via state mapping networks"
    - "cryptanalysis of a chaotic image encryption algorithm based on information entropy"
    - "cryptanalyzing an image encryption algorithm based on autoblocking and electrocardiography"

Connected through hyperedge HE-3 (induced by source paper "cryptanalysis of a chaotic image encryption algorithm based on information entropy"):
  with members:
    - "cryptanalyzing an image scrambling encryption algorithm of pixel bits"
    - "on the cryptanalysis of fridrich s chaotic image encryption scheme"
    - "cryptanalyzing an image encryption algorithm based on autoblocking and electrocardiography"
    - "cryptanalyzing image encryption using chaotic logistic map"
    - "dynamic analysis of chaotic maps as complex networks in the digital domain"
    - "network analysis of the state space of chaotic map in digital domain"
    - "entropy and set cardinality inequalities for partition determined functions"

Connected through hyperedge HE-4 (induced by source paper "on the cryptanalysis of fridrich s chaotic image encryption scheme"):
  with members:
    - "deciphering an image cipher based on mixed transformed logistic maps"
    - "breaking a novel image encryption scheme based on improved hyperchaotic sequences"
    - "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"

Connected through hyperedge HE-5 (induced by source paper "cryptanalyzing an image scrambling encryption algorithm of pixel bits"):
  with members:
    - "on the cryptanalysis of fridrich s chaotic image encryption scheme"
    - "breaking a novel image encryption scheme based on improved hyperchaotic sequences"
    - "a general quantitative cryptanalysis of permutation only multimedia ciphers against plaintext attacks"

Connected through hyperedge HE-6 (induced by source paper "cryptanalysis of a classical chaos based cryptosystem with some quantum cryptography features"):
  with members:
    - "on the cryptanalysis of fridrich s chaotic image encryption scheme"
    - "deciphering an image cipher based on mixed transformed logistic maps"
    - "breaking a novel image encryption scheme based on improved hyperchaotic sequences"

Connected through hyperedge HE-7 (induced by source paper "design and arm embedded implementation of a chaotic map based multicast scheme for multiuser speech wireless communication"):
  with members:
    - "on the cryptanalysis of fridrich s chaotic image encryption scheme"
    - "breaking a novel image encryption scheme based on improved hyperchaotic sequences"
    - "a general quantitative cryptanalysis of permutation only multimedia ciphers against plaintext attacks"
    - "cryptanalyzing an encryption scheme based on blind source separation"

Connected through hyperedge HE-8 (induced by source paper "cryptanalysis of an image scrambling encryption algorithm"):
  with members:
    - "a general quantitative cryptanalysis of permutation only multimedia ciphers against plaintext attacks"

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)