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: "using a secret key to foil an eavesdropper"
  Abstract: This work addresses private communication with distributed systems in mind. We consider how to best use secret key resources and communication to transmit signals across a system so that an eavesdropper is least capable to act on the signals. One of the key assumptions is that the private signals are publicly available with a delay---in this case a delay of one. We find that even if the source signal (information source) is memoryless, the design and performance of the optimal system has a strong dependence on which signals are assumed to be available to the eavesdropper with delay. #R##N#Specifically, we consider a distributed system with two components where information is known to only one component and communication resources are limited. Instead of measuring secrecy by "equivocation," we define a value function for the system, based on the actions of the system and the adversary, and characterize the optimal performance of the system, as measured by the average value obtained against the worst adversary. The resulting optimal rate-payoff region is expressed with information theoretic inequalities, and the optimal communication methods are not standard source coding techniques but instead are methods that stem from synthesizing a memoryless channel.

Connected through hyperedge HE-1 (induced by source paper "a large deviations approach to secure lossy compression"):
  with members:
    - "measuring secrecy by the probability of a successful guess"
    - "the henchman problem measuring secrecy by the minimum distortion in a list"
    - "optimum trade offs between the error exponent and the excess rate exponent of variable rate slepian wolf coding"
    - "rate distortion theory for secrecy systems"
    - "errors and erasures decoding for block codes with feedback"
    - "secrecy is cheap if the adversary must reconstruct"
    - "secure lossless compression with side information"
    - "lossless compression with security constraints"

Connected through hyperedge HE-2 (induced by source paper "secure cascade channel synthesis"):
  with members:
    - "strong coordination over multi hop line networks"
    - "secrecy in cascade networks"
    - "the likelihood encoder for lossy source compression"
    - "strong coordination over a line network"
    - "distributed channel synthesis"
    - "rate distortion theory for secrecy systems"
    - "achievability proof via output statistics of random binning"
    - "secure channel simulation"

Connected through hyperedge HE-3 (induced by source paper "gaussian secure source coding and wyner s common information"):
  with members:
    - "an extremal inequality for long markov chains"
    - "secure coordination with a two sided helper"
    - "the lossy common information of correlated sources"
    - "wyner s common information generalizations and a new lossy source coding interpretation"
    - "a bit of secrecy for gaussian source compression"
    - "optimal equivocation in secrecy systems a special case of distortion based characterization"
    - "on secure source coding with side information at the encoder"
    - "distributed channel synthesis"

Connected through hyperedge HE-4 (induced by source paper "joint source channel secrecy using hybrid coding"):
  with members:
    - "rate distortion based physical layer secrecy with applications to multimode fiber"
    - "a rate distortion based secrecy system with side information at the decoders"
    - "the likelihood encoder for lossy source compression"
    - "the likelihood encoder for source coding"
    - "distributed channel synthesis"
    - "rate distortion theory for secrecy systems"
    - "hybrid coding an interface for joint source channel coding and network communication"
    - "source channel secrecy with causal disclosure"

Connected through hyperedge HE-5 (induced by source paper "secure coordination with a two sided helper"):
  with members:
    - "optimal equivocation in secrecy systems a special case of distortion based characterization"
    - "the likelihood encoder for source coding"
    - "on secure source coding with side information at the encoder"
    - "distributed channel synthesis"
    - "rate distortion theory for secrecy systems"
    - "multiterminal source coding under logarithmic loss"
    - "secure lossy source coding with side information at the decoders"
    - "a framework for partial secrecy"

Connected through hyperedge HE-6 (induced by source paper "a rate distortion based secrecy system with side information at the decoders"):
  with members:
    - "secure transmission of sources over noisy channels with side information at the receivers"
    - "the likelihood encoder for lossy source compression"
    - "a bit of secrecy for gaussian source compression"
    - "the likelihood encoder for source coding"
    - "distributed channel synthesis"
    - "rate distortion theory for secrecy systems"
    - "secrecy is cheap if the adversary must reconstruct"
    - "secure lossy source coding with side information at the decoders"

Connected through hyperedge HE-7 (induced by source paper "distributed channel synthesis"):
  with members:
    - "secure cascade channel synthesis"
    - "a connection between good rate distortion codes and backward dmcs"
    - "on secure communication with constrained randomization"
    - "achievability proof via output statistics of random binning"
    - "channel simulation via interactive communications"
    - "coordination via a relay"
    - "secrecy is cheap if the adversary must reconstruct"
    - "generating dependent random variables over networks"

Connected through hyperedge HE-8 (induced by source paper "optimal equivocation in secrecy systems a special case of distortion based characterization"):
  with members:
    - "secrecy is cheap if the adversary must reconstruct"
    - "multiterminal source coding under logarithmic loss"
    - "multiterminal source coding with an entropy based distortion measure"
    - "secure lossy source coding with side information at the decoders"
    - "a framework for partial secrecy"
    - "secure source coding with a helper"
    - "secure lossless compression with side information"

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)