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 for cryptographic security enhancement using stopping sets"
  Abstract: In this paper, we discuss the ability of channel codes to enhance cryptographic secrecy. Toward that end, we present the secrecy metric of degrees of freedom in an attacker's knowledge of the cryptogram, which is similar to equivocation. Using this notion of secrecy, we show how a specific practical channel coding system can be used to hide information about the ciphertext, thus increasing the difficulty of cryptographic attacks. The system setup is the wiretap channel model where transmitted data traverse through independent packet erasure channels (PECs) with public feedback for authenticated automatic repeat-request (ARQ). The code design relies on puncturing nonsystematic low-density parity-check (LDPC) codes with the intent of inflicting an eavesdropper with stopping sets in the decoder. The design amplifies errors when stopping sets occur such that a receiver must guess all the channel-erased bits correctly to avoid an error rate of one half in the ciphertext. We extend previous results on the coding scheme by giving design criteria that reduce the effectiveness of a maximum-likelihood (ML) attack to that of a message-passing (MP) attack. We further extend security analysis to models with multiple receivers and collaborative attackers. Cryptographic security is even enhanced by the system when eavesdroppers have better channel quality than legitimate receivers.

Connected through hyperedge HE-1 (induced by source paper "improving phy security of uav enabled transmission with wireless energy harvesting robust trajectory design and power allocation"):
  with members:
    - "on the performance of low altitude uav enabled secure af relaying with cooperative jamming and swipt"
    - "uav communications for 5g and beyond recent advances and future trends"
    - "physical layer security in uav systems challenges and opportunities"
    - "securing uav communications via joint trajectory and power control"
    - "a tutorial on uavs for wireless networks applications challenges and open problems"
    - "robust trajectory and transmit power design for secure uav communications"
    - "secure uav communication with cooperative jamming and trajectory control"
    - "securing uav communications via trajectory optimization"

Connected through hyperedge HE-2 (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 with scrambling concatenation and harq for the awgn wire tap channel a security gap analysis"
    - "physical layer security combining error control coding and cryptography"

Connected through hyperedge HE-3 (induced by source paper "ldpc codes over gaussian multiple access wiretap channel"):
  with members:
    - "secret sharing ldpc codes for the bpsk constrained gaussian wiretap channel"

Connected through hyperedge HE-4 (induced by source paper "ldpc based code hopping for gaussian wiretap channel with limited feedback"):
  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"
    - "lattice codes for the gaussian wiretap channel"
    - "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-5 (induced by source paper "artificial noise aided secrecy information and power transfer in ofdma systems"):
  with members:
    - "secrecy wireless information and power transfer in fading wiretap channel"
    - "energy harvesting for physical layer security in ofdma networks"
    - "secrecy wireless information and power transfer with miso beamforming"
    - "multiuser miso beamforming for simultaneous wireless information and power transfer"
    - "energy efficient resource allocation in multiuser ofdm systems with wireless information and power transfer"
    - "resource allocation for secure communication in systems with wireless information and power transfer"
    - "power allocation and time domain artificial noise design for wiretap ofdm with discrete inputs"
    - "spectral efficient optimization in ofdm systems with wireless information and power transfer"

Connected through hyperedge HE-6 (induced by source paper "analysis of short blocklength codes for secrecy"):
  with members:
    - "quantifying equivocation for finite blocklength wiretap codes"
    - "performance assessment and design of finite length ldpc codes for the gaussian wiretap channel"
    - "semantically secure lattice codes for the gaussian wiretap channel"
    - "principles of physical layer security in multiuser wireless networks a survey"
    - "deterministic constructions for large girth protograph ldpc codes"
    - "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"
    - "achieving the secrecy capacity of wiretap channels using polar codes"

Connected through hyperedge HE-7 (induced by source paper "secrecy transmission on block fading channels theoretical limits and performance of practical codes"):
  with members:
    - "on secrecy capacity of fast fading multiple input wiretap channels with statistical csit"
    - "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"
    - "on secrecy rate of the generalized artificial noise assisted secure beamforming for wiretap channels"
    - "secret sharing ldpc codes for the bpsk constrained gaussian wiretap channel"
    - "increasing physical layer security through scrambled codes and arq"
    - "rethinking the secrecy outage formulation a secure transmission design perspective"
    - "achieving the secrecy capacity of wiretap channels using polar codes"

Connected through hyperedge HE-8 (induced by source paper "physical layer security over correlated erasure channels"):
  with members:
    - "achieving the secrecy capacity of wiretap channels using polar codes"
    - "strong secrecy for erasure wiretap channels"
    - "secrecy capacity over correlated ergodic fading channel"
    - "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.CR(Cryptography and Security)