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: "security and complexity of the mceliece cryptosystem based on quasi cyclic low density parity check codes"
  Abstract: In the context of public key cryptography, the McEliece cryptosystem represents a very smart solution based on the hardness of the decoding problem, which is believed to be able to resist the advent of quantum computers. Despite this, the original McEliece cryptosystem based on Goppa codes, has encountered limited interest in practical applications, partly because of some constraints imposed by this very special class of codes. The authors have recently introduced a variant of the McEliece cryptosystem including low-density parity-check codes, that are state-of-the-art codes, now used in many telecommunication standards and applications. In this study, the authors discuss the possible use of a bit-flipping decoder in this context, which gives a significant advantage in terms of complexity. The authors also provide theoretical arguments and practical tools for estimating the trade-off between security and complexity, in such a way to give a simple procedure for the system design.

Connected through 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"):
  with members:
    - "analysis of reaction and timing attacks against cryptosystems based on sparse parity check codes"
    - "the decoding failure probability of mdpc codes"
    - "ledakem a post quantum key encapsulation mechanism based on qc ldpc codes"
    - "hindering reaction attacks by using monomial codes in the mceliece cryptosystem"
    - "on the guaranteed error correction capability of ldpc codes"

Connected through hyperedge HE-2 (induced by source paper "low rank parity check codes new decoding algorithms and applications to cryptography"):
  with members:
    - "ranksynd a prng based on rank metric"
    - "new algorithms for decoding in the rank metric and an attack on the lrpc cryptosystem"
    - "on the complexity of the rank syndrome decoding problem"
    - "cryptanalysis of two mceliece cryptosystems based on quasi cyclic codes"
    - "properties of codes in rank metric"

Connected through hyperedge HE-3 (induced by source paper "an efficient structural attack on nist submission dags"):
  with members:
    - "on the security of some compact keys for mceliece scheme"
    - "quantum resistant random linear code based public key encryption scheme rlce"
    - "squares of random linear codes"
    - "a polynomial time attack on the bbcrs scheme"
    - "cryptanalysis of mceliece cryptosystem based on algebraic geometry codes and their subcodes"
    - "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"

Connected through hyperedge HE-4 (induced by source paper "ledakem a post quantum key encapsulation mechanism based on qc ldpc codes"):
  with members:
    - "quantum information set decoding algorithms"
    - "worst case qc mdpc decoder for mceliece cryptosystem"
    - "optimization of the parity check matrix density in qc ldpc code based mceliece cryptosystems"
    - "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 "assessing and countering reaction attacks against post quantum public key cryptosystems based on qc ldpc codes"):
  with members:
    - "ledakem a post quantum key encapsulation mechanism based on qc ldpc codes"

Connected through hyperedge HE-6 (induced by source paper "pkc pc a variant of the mceliece public key cryptosystem based on polar codes"):
  with members:
    - "performance limits and practical decoding of interleaved reed solomon polar concatenated codes"
    - "polynomial time attack on wild mceliece over quadratic extensions"
    - "universal bounds on the scaling behavior of polar codes"
    - "a cca2 secure variant of the mceliece cryptosystem"
    - "achieving the secrecy capacity of wiretap channels using polar codes"

Connected through hyperedge HE-7 (induced by source paper "soft mceliece mdpc code based mceliece cryptosystems with very compact keys through real valued intentional errors"):
  with members:
    - "optimization of the parity check matrix density in qc ldpc code based mceliece cryptosystems"
    - "improving the efficiency of the ldpc code based mceliece cryptosystem through irregular codes"
    - "scaling efficient code based cryptosystems for embedded platforms"
    - "on a family of circulant matrices for quasi cyclic low density generator matrix codes"

Connected through hyperedge HE-8 (induced by source paper "optimization of the parity check matrix density in qc ldpc code based mceliece cryptosystems"):
  with members:
    - "low power secret key agreement over ofdm"
    - "coding with scrambling concatenation and harq for the awgn wire tap channel a security gap analysis"
    - "increasing physical layer security through scrambled codes and arq"
    - "enhanced public key security for the mceliece cryptosystem"
    - "on a family of circulant matrices for quasi cyclic low density generator matrix codes"
    - "non systematic codes for physical layer security"
    - "construction of near optimum burst erasure correcting low density parity check codes"

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)