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 "ledakem a post quantum key encapsulation mechanism based on qc ldpc codes"):
  Abstract: This work presents a new code-based key encapsulation mechanism (KEM) called LEDAkem. It is built on the Niederreiter cryptosystem and relies on quasi-cyclic low-density parity-check codes as secret codes, providing high decoding speeds and compact keypairs. LEDAkem uses ephemeral keys to foil known statistical attacks, and takes advantage of a new decoding algorithm that provides faster decoding than the classical bit-flipping decoder commonly adopted in this kind of systems. The main attacks against LEDAkem are investigated, taking into account quantum speedups. Some instances of LEDAkem are designed to achieve different security levels against classical and quantum computers. Some performance figures obtained through an efficient C99 implementation of LEDAkem are provided.

Includes members:
  Member "quantum information set decoding algorithms":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "improved quantum information set decoding")
  Member "worst case qc mdpc decoder for mceliece cryptosystem":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "cryptanalysis of a public key encryption scheme based on qc ldpc and qc mdpc codes")
  Member "security and complexity of the mceliece cryptosystem based on quasi cyclic low density parity check codes":
    also connected through other hyperedges:
      - Hyperedge HE-3 (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-4 (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-5 (induced by source paper "on the security of a loidreau s rank metric code based encryption scheme")
  Member "cryptanalysis of two mceliece cryptosystems based on quasi cyclic codes":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "protograph based decoding of ldpc codes with hamming weight amplifiers")

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)