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: "secrecy transmission on block fading channels theoretical limits and performance of practical codes"
  Abstract: We consider a system where an agent (Alice) aims at transmitting a message to a second agent (Bob), while keeping a third agent (Eve) in the dark, by using physical layer techniques. For a transmission over frequency non selective block fading channels, we assume that Alice perfectly knows the channel with respect to Bob, but she has only a statistical knowledge of the channel with respect to Eve. We derive bounds on the achievable outage secrecy rates, considering messages spanning either one or many fading blocks. Transmit power is adapted to fading conditions, with a constraint on the average power over the entire transmission. We also focus on the maximum cumulative outage secrecy rate that can be achieved. In order to assess the performance in a practical scenario, we consider transmissions encoded with practical error correcting codes. In particul ar, we extend the definitions of both security gap and equivocation rate ‐ previously applied to the additive white Gaussian noise channel ‐ to fading channels, taking into account the error rate targets. Bound s on these performance metrics are derived for a block Rayleigh fading channel. Numerical results are provided, confirming the feasibility of the considered physical layer security techniques.

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)