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 distinguisher based attack on a variant of mceliece s cryptosystem based on reed solomon codes"
  Abstract: Baldi et \textit{al.} proposed a variant of McEliece's cryptosystem. The main idea is to replace its permutation matrix by adding to it a rank 1 matrix. The motivation for this change is twofold: it would allow the use of codes that were shown to be insecure in the original McEliece's cryptosystem, and it would reduce the key size while keeping the same security against generic decoding attacks. The authors suggest to use generalized Reed-Solomon codes instead of Goppa codes. The public code built with this method is not anymore a generalized Reed-Solomon code. On the other hand, it contains a very large secret generalized Reed-Solomon code. In this paper we present an attack that is built upon a distinguisher which is able to identify elements of this secret code. The distinguisher is constructed by considering the code generated by component-wise products of codewords of the public code (the so-called "square code"). By using square-code dimension considerations, the initial generalized Reed-Solomon code can be recovered which permits to decode any ciphertext. A similar technique has already been successful for mounting an attack against a homomorphic encryption scheme suggested by Bogdanoc et \textit{al.}. This work can be viewed as another illustration of how a distinguisher of Reed-Solomon codes can be used to devise an attack on cryptosystems based on them.

Connected through hyperedge HE-1 (induced by source paper "encryption scheme based on expanded reed solomon codes"):
  with members:
    - "generalization of the ball collision algorithm"
    - "ledakem a post quantum key encapsulation mechanism based on qc ldpc codes"
    - "variations of the mceliece cryptosystem"
    - "cryptanalysis of mceliece cryptosystem based on algebraic geometry codes and their subcodes"
    - "polynomial time attack on wild mceliece over quadratic extensions"
    - "distinguisher based attacks on public key cryptosystems using reed solomon codes"
    - "an efficient attack of a mceliece cryptosystem variant based on convolutional codes"
    - "cryptanalysis of two mceliece cryptosystems based on quasi cyclic codes"

Connected through hyperedge HE-2 (induced by source paper "practical algebraic attack on dags"):
  with members:
    - "on the security of some compact keys for mceliece scheme"
    - "an efficient structural attack on nist submission dags"
    - "folding alternant and goppa codes with non trivial automorphism groups"
    - "polynomial time attack on wild mceliece over quadratic extensions"
    - "distinguisher based attacks on public key cryptosystems using reed solomon codes"
    - "a distinguisher based attack of a homomorphic encryption scheme relying on reed solomon codes"

Connected through hyperedge HE-3 (induced by source paper "distinguisher based attacks on public key cryptosystems using reed solomon codes"):
  with members:
    - "polynomial time attack on wild mceliece over quadratic extensions"
    - "a distinguisher based attack of a homomorphic encryption scheme relying on reed solomon codes"
    - "error correcting pairs for a public key cryptosystem"
    - "homomorphic encryption from codes"
    - "enhanced public key security for the mceliece cryptosystem"

Connected through hyperedge HE-4 (induced by source paper "an efficient attack of a mceliece cryptosystem variant based on convolutional codes"):
  with members:
    - "distinguisher based attacks on public key cryptosystems using reed solomon codes"
    - "enhanced public key security for the mceliece cryptosystem"
    - "cryptanalysis of two mceliece cryptosystems based on quasi cyclic codes"

Connected through hyperedge HE-5 (induced by source paper "enhanced public key security for the mceliece cryptosystem"):
  with members:
    - "security and complexity of the mceliece cryptosystem based on quasi cyclic low density parity check codes"
    - "distinguisher based attacks on public key cryptosystems using reed solomon codes"
    - "optimization of the parity check matrix density in qc ldpc code based mceliece cryptosystems"
    - "an efficient cca2 secure variant of the mceliece cryptosystem in the standard model"
    - "improving the efficiency of the ldpc code based mceliece cryptosystem through irregular codes"
    - "a cca2 secure variant of the mceliece cryptosystem"
    - "error correcting pairs for a public key cryptosystem"
    - "on the decoding complexity of cyclic codes up to the bch bound"

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)