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 "using ldgm codes and sparse syndromes to achieve digital signatures"):
  Abstract: In this paper, we address the problem of achieving efficient code-based digital signatures with small public keys. The solution we propose exploits sparse syndromes and randomly designed low-density generator matrix codes. Based on our evaluations, the proposed scheme is able to outperform existing solutions, permitting to achieve considerable security levels with very small public keys.

Includes members:
  Member "security and complexity of the mceliece cryptosystem based on quasi cyclic low density parity check codes":
    also connected through other hyperedges:
      - Hyperedge HE-1 (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 "optimization of the parity check matrix density in qc ldpc code based mceliece cryptosystems":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "protograph based decoding of ldpc codes with hamming weight amplifiers")
  Member "enhanced public key security for the mceliece cryptosystem":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "on the security of a loidreau s rank metric code based encryption scheme")
  Member "on a family of circulant matrices for quasi cyclic low density generator matrix codes":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "soft mceliece mdpc code based mceliece cryptosystems with very compact keys through real valued intentional errors")

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)