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: "improved cryptanalysis of rank metric schemes based on gabidulin codes"
  Abstract: We prove that any variant of the GPT cryptosystem which uses a right column scrambler over the extension field as advocated by the works of Gabidulin et al. with the goal to resist to Overbeck's structural attack are actually still vulnerable to that attack. We show that by applying the Frobenius operator appropriately on the public key, it is possible to build a Gabidulin code having the same dimension as the original secret Gabidulin code but with a lower length. In particular, the code obtained by this way correct less errors than the secret one but its error correction capabilities are beyond the number of errors added by a sender, and consequently an attacker is able to decrypt any ciphertext with this degraded Gabidulin code. We also considered the case where an isometric transformation is applied in conjunction with a right column scrambler which has its entries in the extension field. We proved that this protection is useless both in terms of performance and security. Consequently, our results show that all the existing techniques aiming to hide the inherent algebraic structure of Gabidulin codes have failed.

Connected through hyperedge HE-1 (induced by source paper "algebraic attacks for solving the rank decoding and minrank problems without gr obner basis"):
  with members:
    - "an algebraic attack on rank metric code based cryptosystems"
    - "two attacks on rank metric code based schemes ranksign and an identity based encryption scheme"
    - "new algorithms for decoding in the rank metric and an attack on the lrpc cryptosystem"
    - "on the complexity of the rank syndrome decoding problem"

Connected through hyperedge HE-2 (induced by source paper "equivalence and characterizations of linear rank metric codes based on invariants"):
  with members:
    - "on the security of a loidreau s rank metric code based encryption scheme"
    - "invariants and inequivalence of linear rank metric codes"
    - "random construction of partial mds codes"
    - "systematic encoders for generalized gabidulin codes and the q analogue of cauchy matrices"
    - "on the genericity of maximum rank distance and gabidulin codes"
    - "generalized gabidulin codes over fields of any characteristic"
    - "new criteria for mrd and gabidulin codes and some rank metric code constructions"
    - "further generalisations of twisted gabidulin codes"

Connected through hyperedge HE-3 (induced by source paper "an algebraic attack on rank metric code based cryptosystems"):
  with members:
    - "two attacks on rank metric code based schemes ranksign and an identity based encryption scheme"
    - "ranksign an efficient signature algorithm based on the rank metric"
    - "powers of tensors and fast matrix multiplication"
    - "on the complexity of the rank syndrome decoding problem"

Connected through hyperedge HE-4 (induced by source paper "polynomial time key recovery attack on the faure loidreau scheme based on gabidulin codes"):
  with members:
    - "polynomial time attack on wild mceliece over quadratic extensions"
    - "distinguisher based attacks on public key cryptosystems using reed solomon codes"
    - "on the complexity of the rank syndrome decoding problem"
    - "a smart approach for gpt cryptosystem based on rank codes"
    - "on improving security of gpt cryptosystems"

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)