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: "coding with scrambling concatenation and harq for the awgn wire tap channel a security gap analysis"
  Abstract: This paper examines the use of nonsystematic channel codes to obtain secure transmissions over the additive white Gaussian noise wire-tap channel. Unlike the previous approaches, we propose to implement nonsystematic coded transmission by scrambling the information bits, and characterize the bit error rate of scrambled transmissions through theoretical arguments and numerical simulations. We have focused on some examples of Bose-Chaudhuri-Hocquenghem and low-density parity-check codes to estimate the security gap, which we have used as a measure of physical layer security, in addition to the bit error rate. Based on a number of numerical examples, we found that such a transmission technique can outperform alternative solutions. In fact, when an eavesdropper (Eve) has a worse channel than the authorized user (Bob), the security gap required to reach a given level of security is very small. The amount of degradation of Eve's channel with respect to Bob's that is needed to achieve sufficient security can be further reduced by implementing scrambling and descrambling operations on blocks of frames, rather than on single frames. While Eve's channel has a quality equal to or better than that of Bob's channel, we have shown that the use of a hybrid automatic repeat-request protocol with authentication still allows achieving a sufficient level of security. Finally, the secrecy performance of some practical schemes has also been measured in terms of the equivocation rate about the message at the eavesdropper and compared with that of ideal codes.

Connected through hyperedge HE-1 (induced by source paper "a survey of physical layer security techniques for 5g wireless networks and challenges ahead"):
  with members:
    - "secure massive mimo systems with limited rf chains"
    - "secure transmission with large numbers of antennas and finite alphabet inputs"
    - "probabilistically robust swipt for secrecy misome systems"
    - "exploiting full duplex receivers for achieving secret communications in multiuser miso networks"
    - "full duplex bidirectional secure communications under perfect and distributionally ambiguous eavesdropper s csi"
    - "safeguarding decentralized wireless networks using full duplex jamming receivers"
    - "physical layer security aware routing and performance tradeoffs in ad hoc networks"
    - "hybrid procoder and combiner design for secure transmission in mmwave mimo systems"

Connected through hyperedge HE-2 (induced by source paper "an overview of physical layer security with finite alphabet signaling"):
  with members:
    - "a survey of physical layer security techniques for 5g wireless networks and challenges ahead"
    - "physical layer cryptography through massive mimo"
    - "linear precoding of data and artificial noise in secure massive mimo systems"
    - "sum secrecy rate maximization for full duplex two way relay networks using alamouti based rank two beamforming"
    - "performance of lattice coset codes on universal software radio peripherals"
    - "secure m psk communication via directional modulation"
    - "finite blocklength bounds for wiretap channels"
    - "physical layer security in millimeter wave cellular networks"

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 "physical layer security does it work in a real environment"):
  with members:
    - "quantifying equivocation for finite blocklength wiretap codes"
    - "analysis of short blocklength codes for secrecy"
    - "semantically secure lattice codes for the gaussian wiretap channel"
    - "principles of physical layer security in multiuser wireless networks a survey"
    - "coding for cryptographic security enhancement using stopping sets"
    - "physical layer security combining error control coding and cryptography"

Connected through hyperedge HE-5 (induced by source paper "ldpc based code hopping for gaussian wiretap channel with limited feedback"):
  with members:
    - "ldpc code design for the bpsk constrained gaussian wiretap channel"
    - "lattice codes for the gaussian wiretap channel"
    - "coding for cryptographic security enhancement using stopping sets"
    - "the secrecy capacity region of the gaussian mimo multi receiver wiretap channel"
    - "the secrecy capacity of the mimo wiretap channel"
    - "applications of ldpc codes to the wiretap channel"

Connected through hyperedge HE-6 (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"
    - "secret sharing ldpc codes for the bpsk constrained gaussian wiretap channel"
    - "ldpc code design for the bpsk constrained gaussian wiretap channel"
    - "rethinking the secrecy outage formulation a secure transmission design perspective"

Connected through hyperedge HE-7 (induced by source paper "rate adaptation for secure harq protocols"):
  with members:
    - "fundamental limits of communication with low probability of detection"
    - "covert communication over noisy channels a resolvability perspective"
    - "adaptive cross packet harq"
    - "harq buffer management an information theoretic view"
    - "semantic security capacity for wiretap channels of type ii"
    - "block fading channels with delayed csit at finite blocklength"
    - "effective secrecy reliability confusion and stealth"
    - "rethinking the secrecy outage formulation a secure transmission design perspective"

Connected through hyperedge HE-8 (induced by source paper "information theoretic physical layer security for satellite channels"):
  with members:
    - "secure multiplex coding with dependent and non uniform multiple messages"
    - "joint power control in wiretap interference channels"
    - "tight exponential analysis of universally composable privacy amplification and its applications"
    - "exponential decreasing rate of leaked information in universal random privacy amplification"
    - "secure satellite communication systems design with individual secrecy rate constraints"
    - "achieving the secrecy capacity of wiretap channels using polar codes"
    - "strong secrecy on the binary erasure wiretap channel using large girth ldpc codes"
    - "applications of ldpc codes to the wiretap channel"

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)