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 "achieving shannon capacity region as secrecy rate region in a multiple access wiretap channel"):
  Abstract: We consider a two user multiple-access channel with an eavesdropper at the receiving end. We use previously transmitted messages as a key in the next slot till we achieve the capacity region of the usual Multiple Access Channel (MAC).

Includes members:
  Member "achieving shannon capacity in a wiretap channel via previous messages":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "enhancing secrecy rate region for recent messages for a slotted multiple access wiretap channel to shannon capacity region")
  Member "previous messages provide the key to achieve shannon capacity in a wiretap channel":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "mitigating rate loss in fading multiple access wiretap channel to achieve shannon capacity region")
  Member "achievable secrecy sum rate in a fading mac wt with power control and without csi of eavesdropper":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "resource allocation in a mac with and without security via game theoretic learning")
  Member "the wiretap channel with feedback encryption over the channel":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "a survey of physical layer security techniques for 5g wireless networks and challenges ahead")
  Member "the gaussian multiple access wire tap channel":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "an achievable region for the multiple access wiretap channels with confidential and open messages")

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)