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: "everlasting secrecy by exploiting non idealities of the eavesdropper s receiver"
  Abstract: Secure communication over a memoryless wiretap channel in the presence of a passive eavesdropper is considered. Traditional information-theoretic security methods require an advantage for the main channel over the eavesdropper channel to achieve a positive secrecy rate, which in general cannot be guaranteed in wireless systems. Here, we exploit the non-linear conversion operation in the eavesdropper's receiver to obtain the desired advantage - even when the eavesdropper has perfect access to the transmitted signal at the input to their receiver. The basic idea is to employ an ephemeral cryptographic key to force the eavesdropper to conduct two operations, at least one of which is non-linear, in a different order than the desired recipient. Since non-linear operations are not necessarily commutative, the desired advantage can be obtained and information-theoretic secrecy achieved even if the eavesdropper is given the cryptographic key immediately upon transmission completion. In essence, the lack of knowledge of the key during the short transmission time inhibits the recording of the signal in such a way that the secret information can never be extracted from it. The achievable secrecy rates for different countermeasures that the eavesdropper might employ are evaluated. It is shown that even in the case of an eavesdropper with uniformly better conditions (channel and receiver quality) than the intended recipient, a positive secure rate can be achieved.

Connected through hyperedge HE-1 (induced by source paper "multi hop routing in covert wireless networks"):
  with members:
    - "covert communication achieved by a greedy relay in wireless networks"
    - "energy efficient secrecy in wireless networks based on random jamming"
    - "on covert communication with noise uncertainty"
    - "fundamental limits of communication with low probability of detection"
    - "covert communication over noisy channels a resolvability perspective"
    - "jamming based on an ephemeral key to obtain everlasting security in wireless environments"
    - "quantum secure covert communication on bosonic channels"
    - "covert single hop communication in a wireless network with distributed artificial noise generation"

Connected through hyperedge HE-2 (induced by source paper "energy efficient secrecy in wireless networks based on random jamming"):
  with members:
    - "energy efficient routing in wireless networks in the presence of jamming"
    - "optimal energy and data routing in networks with energy cooperation"
    - "jamming based on an ephemeral key to obtain everlasting security in wireless environments"
    - "secure degrees of freedom of one hop wireless networks"
    - "scaling laws for secrecy capacity in cooperative wireless networks"
    - "optimal relay selection for physical layer security in cooperative wireless networks"
    - "efficient wireless security through jamming coding and routing"
    - "on secrecy capacity scaling in wireless networks"

Connected through hyperedge HE-3 (induced by source paper "jamming based on an ephemeral key to obtain everlasting security in wireless environments"):
  with members:
    - "cooperative jamming for secure communications in mimo relay networks"
    - "cooperative jamming for wireless physical layer security"

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)