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: "information theoretically secret key generation for fading wireless channels"
  Abstract: The multipath-rich wireless environment associated with typical wireless usage scenarios is characterized by a fading channel response that is time-varying, location-sensitive, and uniquely shared by a given transmitter-receiver pair. The complexity associated with a richly scattering environment implies that the short-term fading process is inherently hard to predict and best modeled stochastically, with rapid decorrelation properties in space, time and frequency. In this paper, we demonstrate how the channel state between a wireless transmitter and receiver can be used as the basis for building practical secret key generation protocols between two entities. We begin by presenting a scheme based on level crossings of the fading process, which is well-suited for the Rayleigh and Rician fading models associated with a richly scattering environment. Our level crossing algorithm is simple, and incorporates a self-authenticating mechanism to prevent adversarial manipulation of message exchanges during the protocol. Since the level crossing algorithm is best suited for fading processes that exhibit symmetry in their underlying distribution, we present a second and more powerful approach that is suited for more general channel state distributions. This second approach is motivated by observations from quantizing jointly Gaussian processes, but exploits empirical measurements to set quantization boundaries and a heuristic log likelihood ratio estimate to achieve an improved secret key generation rate. We validate both proposed protocols through experimentations using a customized 802.11a platform, and show for the typical WiFi channel that reliable secret key establishment can be accomplished at rates on the order of 10 bits/second.

Connected through hyperedge HE-1 (induced by source paper "covert secret key generation with an active warden"):
  with members:
    - "covert communication over adversarially jammed channels"
    - "stealthy secret key generation"
    - "covert communication in fading channels under channel uncertainty"
    - "covert communication with channel state information at the transmitter"
    - "fundamental limits of communication with low probability of detection"
    - "the likelihood encoder for lossy compression"
    - "covert communication in the presence of an uninformed jammer"
    - "covert communication over noisy channels a resolvability perspective"

Connected through hyperedge HE-2 (induced by source paper "group secret key generation using algebraic rings in wireless networks"):
  with members:
    - "insider attacks on physical layer group secret key generation in wireless networks"
    - "secret key generation from gaussian sources using lattice hashing"
    - "exploiting channel diversity in secret key generation from multipath fading randomness"
    - "group secret key generation algorithms"

Connected through hyperedge HE-3 (induced by source paper "shared secret key generation via carrier frequency offsets"):
  with members:
    - "principles of physical layer security in multiuser wireless networks a survey"

Connected through hyperedge HE-4 (induced by source paper "group secret key generation using algebraic rings in three user wireless networks"):
  with members:
    - "insider attacks on physical layer group secret key generation in wireless networks"
    - "the effect of eavesdropper s statistics in experimental wireless secret key generation"
    - "secret key generation from gaussian sources using lattice hashing"
    - "exploiting channel diversity in secret key generation from multipath fading randomness"
    - "two hop secure communication using an untrusted relay"
    - "group secret key generation algorithms"

Connected through hyperedge HE-5 (induced by source paper "secret key generation in many to one networks an integrated game theoretic and information theoretic approach"):
  with members:
    - "polar coding for the broadcast channel with confidential messages a random binning analogy"
    - "the capacity region of the source type model for secret key and private key generation"
    - "polar coding for secret key generation"
    - "separation of reliability and secrecy in rate limited secret key generation"
    - "a game theoretic view of the interference channel impact of coordination and bargaining"
    - "a constrained evolutionary gaussian multiple access channel game"
    - "secret key and private key constructions for simple multiterminal source models"
    - "shannon meets nash on the interference channel"

Connected through hyperedge HE-6 (induced by source paper "on the fly secure key generation with deterministic models"):
  with members:
    - "sparse signal processing concepts for efficient 5g system design"
    - "wireless network information flow a deterministic approach"
    - "interference alignment from degrees of freedom to constant gap capacity approximations"
    - "the two user gaussian interference channel a deterministic view"

Connected through hyperedge HE-7 (induced by source paper "quantum inspired secure wireless communication protocol under spatial and local gaussian noise assumptions"):
  with members:
    - "secrecy and robustness for active attack in secure network coding and its application to network quantum key distribution"
    - "secure multiplex coding with dependent and non uniform multiple messages"
    - "key capacity for product sources with application to stationary gaussian processes"
    - "tight exponential analysis of universally composable privacy amplification and its applications"
    - "separation of reliability and secrecy in rate limited secret key generation"
    - "exponential decreasing rate of leaked information in universal random privacy amplification"
    - "secure transmission with artificial noise over fading channels achievable rate and optimal power allocation"
    - "the secrecy capacity of the mimo wiretap channel"

Connected through hyperedge HE-8 (induced by source paper "security guaranteed wireless communication over common noise attack under spatial assumption"):
  with members:
    - "key capacity for product sources with application to stationary gaussian processes"
    - "separation of reliability and secrecy in rate limited secret key generation"
    - "exponential decreasing rate of leaked information in universal random privacy amplification"
    - "secure transmission with artificial noise over fading channels achievable rate and optimal power allocation"

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)