human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "secrecy analysis on network coding in bidirectional multibeam satellite communications"):
  Abstract: Network coding is an efficient means to improve the spectrum efficiency of satellite communications. However, its resilience to eavesdropping attacks is not well understood. This paper studies the confidentiality issue in a bidirectional satellite network consisting of two mobile users who want to exchange message via a multibeam satellite using the XOR network coding protocol. We aim to maximize the sum secrecy rate by designing the optimal beamforming vector along with optimizing the return and forward link time allocation. The problem is nonconvex, and we find its optimal solution using semidefinite programming together with a 1-D search. For comparison, we also solve the sum secrecy rate maximization problem for a conventional reference scheme without using network coding. Simulation results using realistic system parameters demonstrate that the bidirectional scheme using network coding provides considerably higher secrecy rate compared with that of the conventional scheme.

Includes members:
  Member "secure communication over parallel relay channel":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "the arbitrarily varying relay channel")
  Member "a secure communication game with a relay helping the eavesdropper":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "on the security analysis of a cooperative incremental relaying protocol in the presence of an active eavesdropper")
  Member "interference alignment for secrecy":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "adding common randomness can remove the secrecy constraints in communication networks")
  Member "joint relay and jammer selection for secure two way relay networks":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "secure transmission and self energy recycling with partial eavesdropper csi")
  Member "secure satellite communication systems design with individual secrecy rate constraints":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "resource allocations for secure cognitive satellite terrestrial networks")
  Member "physical layer security combining error control coding and cryptography":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "low complexity secure code lcsc design for big data in cloud storage systems")

Question: Please tell me which class the source paper 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)