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: "interference assisted secret communication"
  Abstract: Wireless communication is susceptible to eavesdropping attacks because of its broadcast nature. This paper illustrates how interference can be used to counter eavesdropping and assist secrecy. In particular, a wiretap channel with a helping interferer (WT-HI) is considered. Here, a transmitter sends a confidential message to its intended receiver in the presence of a passive eavesdropper and with the help of an independent interferer. The interferer, which does not know the confidential message, helps in ensuring the secrecy of the message by sending an independent signal. An achievable secrecy rate and several computable outer bounds on the secrecy capacity of the WT-HI are given for both discrete memoryless and Gaussian channels.

Connected through hyperedge HE-1 (induced by source paper "jammer assisted resource allocation in secure ofdma with untrusted users"):
  with members:
    - "principles of physical layer security in multiuser wireless networks a survey"
    - "secrecy sum rates for multi user mimo regularized channel inversion precoding"
    - "on the complexity of joint subcarrier and power allocation for multi user ofdma systems"
    - "on tractability aspects of optimal resource allocation in ofdma systems"
    - "power and subcarrier allocation for physical layer security in ofdma based broadband wireless networks"
    - "a quantitative measure of fairness and discrimination for resource allocation in shared computer systems"

Connected through hyperedge HE-2 (induced by source paper "dispensing with noise forward in the weak relay eavesdropper channel"):
  with members:
    - "relay broadcast channel with confidential messages"
    - "discrete memoryless interference and broadcast channels with confidential messages secrecy rate regions"

Connected through hyperedge HE-3 (induced by source paper "optimal secure gdof of symmetric gaussian wiretap channel with a helper"):
  with members:
    - "secure communication over interference channel to jam or not to jam"
    - "adding a helper can totally remove the secrecy constraints in interference channel"
    - "secure degrees of freedom of one hop wireless networks with no eavesdropper csit"
    - "on the optimality of secure communication without using cooperative jamming"
    - "towards a constant gap sum capacity result for the gaussian wiretap channel with a helper"
    - "the wiretapped diamond relay channel"
    - "finite snr regime analysis of the gaussian wiretap multiple access channel"
    - "secure degrees of freedom of one hop wireless networks"

Connected through hyperedge HE-4 (induced by source paper "secure degrees of freedom of one hop wireless networks with no eavesdropper csit"):
  with members:
    - "secure degrees of freedom of one hop wireless networks"
    - "real interference alignment exploiting the potential of single antenna systems"
    - "mimo broadcast channel with an unknown eavesdropper secrecy degrees of freedom"
    - "aligned image sets under channel uncertainty settling a conjecture by lapidoth shamai and wigger on the collapse of degrees of freedom under finite precision csit"
    - "secure degrees of freedom of k user gaussian interference channels a unified view"
    - "wireless network information flow a deterministic approach"
    - "interference alignment for secrecy"
    - "ergodic secret alignment"

Connected through hyperedge HE-5 (induced by source paper "secrecy optimized resource allocation for device to device communication underlaying heterogeneous networks"):
  with members:
    - "contract based interference coordination in heterogeneous cloud radio access networks"
    - "energy efficient resource assignment and power allocation in heterogeneous cloud radio access networks"
    - "fronthaul constrained cloud radio access networks insights and challenges"
    - "near optimal modulo and forward scheme for the untrusted relay channel"
    - "system architecture and key technologies for 5g heterogeneous cloud radio access networks"
    - "sparse beamforming and user centric clustering for downlink cloud radio access network"
    - "joint resource partitioning and offloading in heterogeneous cellular networks"
    - "pricing based distributed downlink beamforming in multi cell ofdma networks"

Connected through hyperedge HE-6 (induced by source paper "on the achievable secrecy diversity of cooperative networks with untrusted relays"):
  with members:
    - "nonlinear interference alignment in a one dimensional space"
    - "real interference alignment exploiting the potential of single antenna systems"
    - "strong secrecy from channel resolvability"
    - "cooperation with an untrusted relay a secrecy perspective"
    - "the secrecy capacity region of the gaussian mimo multi receiver wiretap channel"
    - "towards the secrecy capacity of the gaussian mimo wire tap channel the 2 2 1 channel"

Connected through hyperedge HE-7 (induced by source paper "physical layer security jamming theoretical limits and practical designs in wireless networks"):
  with members:
    - "to harvest and jam a paradigm of self sustaining friendly jammers for secure af relaying"
    - "physical layer security for massive mimo an overview on passive eavesdropping and active attacks"
    - "principles of physical layer security in multiuser wireless networks a survey"
    - "secure communication with a wireless powered friendly jammer"
    - "improving physical layer secrecy using full duplex jamming receivers"

Connected through hyperedge HE-8 (induced by source paper "on the secrecy capacity region of the 2 user z interference channel with unidirectional transmitter cooperation"):
  with members:
    - "outer bounds on the secrecy capacity region of the 2 user z interference channel with unidirectional transmitter cooperation"
    - "topological interference management through index coding"
    - "secrecy in the 2 user symmetric deterministic interference channel with transmitter cooperation"
    - "multiaccess channel with partially cooperating encoders and security constraints"
    - "interference alignment for secrecy"
    - "interference channels with source cooperation"
    - "interference mitigation through limited transmitter cooperation"
    - "the approximate capacity region of the gaussian z interference channel with conferencing encoders"

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)