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: "secret sharing ldpc codes for the bpsk constrained gaussian wiretap channel"
  Abstract: The problem of secret sharing over the Gaussian wiretap channel is considered. A source and a destination intend to share secret information over a Gaussian channel in the presence of a wiretapper who observes the transmission through another Gaussian channel. Two constraints are imposed on the source-to-destination channel; namely, the source can transmit only binary phase-shift-keyed (BPSK) symbols, and symbol-by-symbol hard-decision quantization is applied to the received symbols of the destination. An error-free public channel is also available for the source and destination to exchange messages in order to help the secret-sharing process. The wiretapper can perfectly observe all messages in the public channel. It is shown that a secret-sharing scheme that employs a random ensemble of regular low-density parity-check (LDPC) codes can achieve the key capacity of the BPSK-constrained Gaussian wiretap channel asymptotically with increasing block length. To accommodate practical constraints of finite block length and limited decoding complexity, fixed irregular LDPC codes are also designed to replace the regular LDPC code ensemble in the proposed secret-sharing scheme.

Connected through hyperedge HE-1 (induced by source paper "ldpc codes over gaussian multiple access wiretap channel"):
  with members:
    - "coding for cryptographic security enhancement using stopping sets"

Connected through hyperedge HE-2 (induced by source paper "on secrecy metrics for physical layer security over quasi static fading channels"):
  with members:
    - "performance assessment and design of finite length ldpc codes for the gaussian wiretap channel"
    - "rethinking the intercept probability of random linear network coding"
    - "probability estimates for fading and wiretap channels from ideal class zeta functions"
    - "secure on off transmission design with channel estimation errors"
    - "wireless physical layer security with imperfect channel state information a survey"
    - "coding with scrambling concatenation and harq for the awgn wire tap channel a security gap analysis"
    - "ldpc code design for the bpsk constrained gaussian wiretap channel"
    - "rethinking the secrecy outage formulation a secure transmission design perspective"

Connected through hyperedge HE-3 (induced by source paper "secret key agreement with large antenna arrays under the pilot contamination attack"):
  with members:
    - "the sender excited secret key agreement model capacity reliability and secrecy exponents"
    - "secure transmission in multi cell massive mimo systems"
    - "secrecy sum rates for multi user mimo regularized channel inversion precoding"
    - "exploiting channel diversity in secret key generation from multipath fading randomness"
    - "achieving the secrecy capacity of wiretap channels using polar codes"
    - "channel estimation and linear precoding in multiuser multiple antenna tdd systems"
    - "polar coding for secure transmission and key agreement"
    - "nested polar codes for wiretap and relay channels"

Connected through hyperedge HE-4 (induced by source paper "performance assessment and design of finite length ldpc codes for the gaussian wiretap channel"):
  with members:
    - "coding with scrambling concatenation and harq for the awgn wire tap channel a security gap analysis"
    - "ldpc code design for the bpsk constrained gaussian wiretap channel"
    - "applications of ldpc codes to the wiretap channel"

Connected through hyperedge HE-5 (induced by source paper "practical ldpc coded modulation schemes for the fading broadcast channel with confidential messages"):
  with members:
    - "new results on multiple input multiple output broadcast channels with confidential messages"
    - "a physical layer secured key distribution technique for ieee 802 11g wireless networks"
    - "coding with scrambling concatenation and harq for the awgn wire tap channel a security gap analysis"
    - "broadcast channels with confidential messages by randomness constrained stochastic encoder"
    - "increasing physical layer security through scrambled codes and arq"
    - "secure broadcasting over fading channels with statistical qos constraints"
    - "capacity region of gaussian mimo broadcast channels with common and confidential messages"
    - "non systematic codes for physical layer security"

Connected through hyperedge HE-6 (induced by source paper "ldpc coded transmissions over the gaussian broadcast channel with confidential messages"):
  with members:
    - "new results on multiple input multiple output broadcast channels with confidential messages"
    - "coding with scrambling concatenation and harq for the awgn wire tap channel a security gap analysis"
    - "broadcast channels with confidential messages by randomness constrained stochastic encoder"
    - "increasing physical layer security through scrambled codes and arq"
    - "achieving the secrecy capacity of wiretap channels using polar codes"
    - "capacity region of gaussian mimo broadcast channels with common and confidential messages"
    - "non systematic codes for physical layer security"
    - "secrecy gain a wiretap lattice code design"

Connected through hyperedge HE-7 (induced by source paper "unshared secret key cryptography"):
  with members:
    - "semantically secure lattice codes for the gaussian wiretap channel"
    - "enhancing secrecy with multi antenna transmission in wireless ad hoc networks"
    - "practical secrecy using artificial noise"
    - "achieving the secrecy capacity of wiretap channels using polar codes"
    - "solutions for the mimo gaussian wiretap channel with a cooperative jammer"
    - "secure transmission with artificial noise over fading channels achievable rate and optimal power allocation"

Connected through hyperedge HE-8 (induced by source paper "achievable secrecy rates over mimome gaussian channels with gmm signals in low noise regime"):
  with members:
    - "secret message transmission by harq with multiple encoding"
    - "a compressed sensing wire tap channel"
    - "rethinking the secrecy outage formulation a secure transmission design perspective"
    - "mimo wiretap channels with arbitrarily varying eavesdropper channel states"
    - "secure transmission with multiple antennas ii the mimome wiretap channel"
    - "on convergence properties of shannon entropy"

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.IT(Information Theory)