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: "reconciliation of a quantum distributed gaussian key"
  Abstract: Two parties, Alice and Bob, wish to distill a binary secret key out of a list of correlated variables that they share after running a quantum key distribution (QKD) protocol based on continuous-spectrum quantum carriers. We present a novel construction that allows the legitimate parties to get equal bit strings out of correlated variables by using a classical channel, with as little leaked information as possible. This opens the way to securely correcting nonbinary key elements. In particular, the construction is refined to the case of Gaussian variables as it applies directly to recent continuous-variable protocols for QKD.

Connected through hyperedge HE-1 (induced by source paper "toward efficient quantum key distribution reconciliation"):
  with members:
    - "rate compatible protocol for information reconciliation an application to qkd"
    - "efficient reconciliation of correlated continuous random variables using ldpc codes"

Connected through hyperedge HE-2 (induced by source paper "separation of reliability and secrecy in rate limited secret key generation"):
  with members:
    - "polar coding for secret key generation"
    - "efficient one way secret key agreement and private channel coding via polarization"
    - "non asymptotic analysis of privacy amplification via renyi entropy and inf spectral entropy"
    - "rate compatible protocol for information reconciliation an application to qkd"
    - "efficient reconciliation protocol for discrete variable quantum key distribution"
    - "the secret key private key capacity region for three terminals"

Connected through hyperedge HE-3 (induced by source paper "secret sharing ldpc codes for the bpsk constrained gaussian wiretap channel"):
  with members:
    - "achieving the secrecy capacity of wiretap channels using polar codes"
    - "polar coding for secure transmission and key agreement"
    - "non systematic codes for physical layer security"
    - "efficient reconciliation protocol for discrete variable quantum key distribution"
    - "channel polarization a method for constructing capacity achieving codes for symmetric binary input memoryless channels"
    - "secret sharing over fast fading mimo wiretap channels"
    - "secure nested codes for type ii wiretap channels"
    - "side information coding with turbo codes and its application to quantum key distribution"

Connected through hyperedge HE-4 (induced by source paper "secret key agreement from correlated gaussian sources by rate limited public communication"):
  with members:
    - "multiple input multiple output gaussian broadcast channels with common and confidential messages"
    - "the secrecy capacity region of the gaussian mimo multi receiver wiretap channel"
    - "secret key agreement by soft decision of signals in gaussian maurer s model"
    - "multiple input multiple output gaussian broadcast channels with confidential messages"
    - "an extremal inequality motivated by multiterminal information theoretic problems"

Connected through hyperedge HE-5 (induced by source paper "information theoretically secret key generation for fading wireless channels"):
  with members:
    - "secret key and private key constructions for simple multiterminal source models"
    - "fingerprints in the ether using the physical layer for wireless authentication"
    - "using the physical layer for wireless authentication in time variant channels"
    - "fuzzy extractors how to generate strong keys from biometrics and other noisy data"

Connected through hyperedge HE-6 (induced by source paper "efficient reconciliation protocol for discrete variable quantum key distribution"):
  with members:
    - "efficient reconciliation of correlated continuous random variables using ldpc codes"

Connected through hyperedge HE-7 (induced by source paper "wireless information theoretic security part ii practical implementation"):
  with members:
    - "slepian wolf code design via source channel correspondence"
    - "on the typicality of the linear code among the ldpc coset code ensemble"

Connected through hyperedge HE-8 (induced by source paper "efficient reconciliation of correlated continuous random variables using ldpc codes"):
  with members:
    - "side information coding with turbo codes and its application to quantum key distribution"

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)