human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "encryption scheme based on expanded reed solomon codes"):
  Abstract: We present a code-based public-key cryptosystem, in which we use Reed-Solomon codes over an extension field as secret codes and disguise it by considering its expanded code over the base field. Considering the expanded codes provide a safeguard against distinguisher attacks based on the Schur product. Moreover, without using cyclic or quasi-cyclic structure we obtain a key size reduction of nearly 60 % compared to the classic McEliece cryptosystem proposed by Bernstein et al.

Includes members:
  Member "generalization of the ball collision algorithm":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "information set decoding of lee metric codes over finite rings")
  Member "ledakem a post quantum key encapsulation mechanism based on qc ldpc codes":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "analysis of the error correction capability of ldpc and mdpc codes under parallel bit flipping decoding and application to cryptography")
  Member "variations of the mceliece cryptosystem":
    also connected through other hyperedges:
      (none)
  Member "cryptanalysis of mceliece cryptosystem based on algebraic geometry codes and their subcodes":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "squares of matrix product codes")
  Member "polynomial time attack on wild mceliece over quadratic extensions":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "squares of matrix product codes")
  Member "distinguisher based attacks on public key cryptosystems using reed solomon codes":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "cryptanalysis of a system based on twisted reed solomon codes")
  Member "an efficient attack of a mceliece cryptosystem variant based on convolutional codes":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "cryptanalysis of a public key encryption scheme based on qc ldpc and qc mdpc codes")
  Member "a distinguisher based attack on a variant of mceliece s cryptosystem based on reed solomon codes":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "practical algebraic attack on dags")

Question: Please tell me which class the source paper 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)