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: "an error probability approach to mimo wiretap channels"
  Abstract: We consider MIMO (Multiple Input Multiple Output) wiretap channels, where a legitimate transmitter Alice is communicating with a legitimate receiver Bob in the presence of an eavesdropper Eve, and communication is done via MIMO channels. We suppose that Alice's strategy is to use a codebook which has a lattice structure, which then allows her to perform coset encoding. We analyze Eve's probability of correctly decoding the message Alice meant to Bob, and from minimizing this probability, we derive a code design criterion for MIMO lattice wiretap codes. The case of block fading channels is treated similarly, and fast fading channels are derived as a particular case. The Alamouti code is carefully studied as an illustration of the analysis provided.

Connected through hyperedge HE-1 (induced by source paper "semantically secure lattice codes for compound mimo channels"):
  with members:
    - "random ensembles of lattices from generalized reductions"
    - "optimal signaling for secure communications over gaussian mimo wiretap channels"
    - "universal lattice codes for mimo channels"
    - "a general formula for compound channel capacity"
    - "the secrecy capacity of compound gaussian mimo wiretap channels"
    - "the mimo wiretap channel decomposed"
    - "construction a of lattices over number fields and block fading wiretap coding"
    - "probability estimates for fading and wiretap channels from ideal class zeta functions"

Connected through hyperedge HE-2 (induced by source paper "well rounded lattices towards optimal coset codes for gaussian and fading wiretap channels"):
  with members:
    - "performance of lattice coset codes on a usrp testbed"
    - "on analytical and geometric lattice design criteria for wiretap coset codes"
    - "well rounded lattices for coset coding in mimo wiretap channels"
    - "information bounds and flatness factor approximation for fading wiretap mimo channels"
    - "theta series approximation with applications to compute and forward relaying"
    - "well rounded lattices for reliability and security in rayleigh fading siso channels"
    - "decoding in compute and forward relaying real lattices and the flatness of lattice sums"
    - "almost universal codes for fading wiretap channels"

Connected through hyperedge HE-3 (induced by source paper "physical layer security for rf satellite channels in the finite length regime"):
  with members:
    - "two way physical layer security protocol for gaussian channels"
    - "free space optical channel estimation for physical layer security"
    - "secure multiplex coding with dependent and non uniform multiple messages"
    - "information theoretic physical layer security for satellite channels"
    - "empirical and strong coordination via soft covering with polar codes"
    - "quantum inspired secure wireless communication protocol under spatial and local gaussian noise assumptions"
    - "secure wireless communication under spatial and local gaussian noise assumptions"
    - "joint power control in wiretap interference channels"

Connected through hyperedge HE-4 (induced by source paper "a survey on mimo transmission with discrete input signals technical challenges advances and future trends"):
  with members:
    - "asymptotic performance analysis of a k hop amplify and forward relay mimo channel"
    - "iterative distributed minimum total mse approach for secure communications in mimo interference channels"
    - "asymptotic analysis of su mimo channels with transmitter noise and mismatched joint decoding"
    - "secure massive mimo transmission with an active eavesdropper"
    - "interference aligned space time transmission with diversity for the 2 times 2 x network"
    - "space time encoded miso broadcast channel with outdated csit an error rate and diversity performance analysis"
    - "high snr asymptotics of mutual information for discrete constellations with applications to bicm"
    - "differential distributed space time coding with imperfect synchronization in frequency selective channels"

Connected through hyperedge HE-5 (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"
    - "secret sharing ldpc codes for the bpsk constrained gaussian wiretap channel"
    - "ldpc code design for the bpsk constrained gaussian wiretap channel"

Connected through hyperedge HE-6 (induced by source paper "well rounded lattices for coset coding in mimo wiretap channels"):
  with members:
    - "on analytical and geometric lattice design criteria for wiretap coset codes"
    - "information bounds and flatness factor approximation for fading wiretap mimo channels"
    - "well rounded lattices for reliability and security in rayleigh fading siso channels"
    - "decoding in compute and forward relaying real lattices and the flatness of lattice sums"
    - "almost universal codes for fading wiretap channels"
    - "probability estimates for fading and wiretap channels from ideal class zeta functions"
    - "a comparison of skewed and orthogonal lattices in gaussian wiretap channels"
    - "semantically secure lattice codes for the gaussian wiretap channel"

Connected through hyperedge HE-7 (induced by source paper "on analytical and geometric lattice design criteria for wiretap coset codes"):
  with members:
    - "performance of lattice coset codes on a usrp testbed"
    - "well rounded lattices for reliability and security in rayleigh fading siso channels"
    - "decoding in compute and forward relaying real lattices and the flatness of lattice sums"
    - "almost universal codes for fading wiretap channels"
    - "locally diverse constellations from the special orthogonal group"
    - "construction a of lattices over number fields and block fading wiretap coding"
    - "probability estimates for fading and wiretap channels from ideal class zeta functions"
    - "semantically secure lattice codes for the gaussian wiretap channel"

Connected through hyperedge HE-8 (induced by source paper "almost universal codes for fading wiretap channels"):
  with members:
    - "almost universal codes achieving ergodic mimo capacity within a constant gap"
    - "probability estimates for fading and wiretap channels from ideal class zeta functions"
    - "number field lattices achieve gaussian and rayleigh channel capacity within a constant gap"
    - "semantically secure lattice codes for the gaussian wiretap channel"
    - "on secrecy capacity of fast fading mimome wiretap channels with statistical csit"
    - "on secrecy capacity of fast fading multiple input wiretap channels with statistical csit"
    - "strong secrecy on the binary erasure wiretap channel using large girth ldpc codes"
    - "strong secrecy from channel resolvability"

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)