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 communication with feedback"
  Abstract: Secure communication with feedback is studied. An achievability scheme in which the backward channel is used to generate a shared secret key is proposed. The scenario of binary symmetric forward and backward channels is considered, and a combination of the proposed scheme and Maurer's coding scheme is shown to achieve improved secrecy rates. The scenario of a Gaussian channel with perfect output feedback is also analyzed and the Schalkwijk-Kailath coding scheme is shown to achieve the secrecy capacity for this channel.

Connected through hyperedge HE-1 (induced by source paper "physical layer security protocol for poisson channels for passive man in the middle attack"):
  with members:
    - "two way physical layer security protocol for gaussian channels"
    - "physical layer security for rf satellite channels in the finite length regime"
    - "signal detection under short interval sampling of continuous waveforms for optical wireless scattering communication"
    - "quantum inspired secure wireless communication protocol under spatial and local gaussian noise assumptions"
    - "secure wireless communication under spatial and local gaussian noise assumptions"
    - "numerical study on secrecy capacity and code length dependence of the performances in optical wiretap channels"
    - "5g wireless backhaul networks challenges and research advances"
    - "exponential decreasing rate of leaked information in universal random privacy amplification"

Connected through hyperedge HE-2 (induced by source paper "secure broadcasting using independent secret keys"):
  with members:
    - "secrecy results for compound wiretap channels"
    - "strong secrecy for multiple access channels"
    - "effective secrecy reliability confusion and stealth"
    - "new results on multiple input multiple output broadcast channels with confidential messages"
    - "capacity results for compound wiretap channels"
    - "strong secrecy from channel resolvability"
    - "capacity region of gaussian mimo broadcast channels with common and confidential messages"
    - "discrete memoryless interference and broadcast channels with confidential messages secrecy rate regions"

Connected through hyperedge HE-3 (induced by source paper "secrecy capacity of colored gaussian noise channels with feedback"):
  with members:
    - "multiple access wiretap channel with noiseless feedback"
    - "an improved feedback coding scheme for the wire tap channel"
    - "control approach to computing the feedback capacity for stationary finite dimensional gaussian channels"
    - "secrecy degrees of freedom of mimo broadcast channels with delayed csit"
    - "the wiretap channel with feedback encryption over the channel"
    - "secrecy capacity of the wiretap channel with noisy feedback"
    - "feedback capacity of stationary gaussian channels"

Connected through hyperedge HE-4 (induced by source paper "a simplified coding scheme for the broadcast channel with complementary receiver side information under individual secrecy constraints"):
  with members:
    - "individual secrecy for broadcast channels with receiver side information"
    - "individual secrecy for the broadcast channel"
    - "brute force searching the typical set and guesswork"
    - "secret key generation using correlated sources and channels"
    - "secrecy via sources and channels"
    - "the wiretap channel with feedback encryption over the channel"

Connected through hyperedge HE-5 (induced by source paper "effects of feedback on the one sided secrecy of two way wiretap through multiple transmissions"):
  with members:
    - "strongly secure communications over the two way wiretap channel"
    - "the role of feedback in two way secure communications"
    - "the wiretap channel with feedback encryption over the channel"

Connected through hyperedge HE-6 (induced by source paper "individual secrecy for broadcast channels with receiver side information"):
  with members:
    - "secure multiplex coding with dependent and non uniform multiple messages"
    - "strong secrecy for cooperative broadcast channels"
    - "individual secrecy for the broadcast channel"
    - "secrecy capacity region of some classes of wiretap broadcast channels"
    - "capacity regions for broadcast channels with degraded message sets and message cognition under different secrecy constraints"
    - "on block security of regenerating codes at the mbr point for distributed storage systems"
    - "effective secrecy reliability confusion and stealth"
    - "new results on multiple input multiple output broadcast channels with confidential messages"

Connected through hyperedge HE-7 (induced by source paper "the wiretap channel with generalized feedback secure communication and key generation"):
  with members:
    - "secret communication over broadcast erasure channels with state feedback"
    - "secret key generation using correlated sources and channels"
    - "on the achievable rate region of a new wiretap channel with side information"
    - "secrecy via sources and channels"
    - "secrecy degrees of freedom of mimo broadcast channels with delayed csit"
    - "the role of feedback in two way secure communications"
    - "the wiretap channel with feedback encryption over the channel"
    - "multiple access channels with generalized feedback and confidential messages"

Connected through hyperedge HE-8 (induced by source paper "control of wireless networks with secrecy"):
  with members:
    - "a secure communication game with a relay helping the eavesdropper"
    - "interference assisted secret communication"
    - "on cooperative relaying schemes for wireless physical layer security"
    - "joint relay and jammer selection for secure two way relay networks"
    - "the secrecy capacity region of the gaussian mimo multi receiver wiretap channel"
    - "optimal scheduling for fair resource allocation in ad hoc networks with elastic and inelastic traffic"
    - "towards the secrecy capacity of the gaussian mimo wire tap channel the 2 2 1 channel"
    - "robust rate adaptive wireless communication using ack nak feedback"

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)