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: "an epistemic approach to coercion resistance for electronic voting protocols"
  Abstract: Coercion resistance is an important and one of themost intricate security requirements of electronicvoting protocols. Several definitions of coercionresistance have been proposed in the literature,including definitions based on symbolic models.However, existing definitions in such models arerather restricted in their scope and quite complex.In this paper, we therefore propose a new definitionof coercion resistance in a symbolic setting, basedon an epistemic approach. Our definition isrelatively simple and intuitive. It allows for afine-grained formulation of coercion resistance andcan be stated independently of a specific, symbolicprotocol and adversary model. As a proof of concept,we apply our definition to three votingprotocols. In particular, we carry out the firstrigorous analysis of the recently proposed Civitassystem. We precisely identify those conditions underwhich this system guarantees coercion resistance orfails to be coercion resistant. We also analyzeprotocols proposed by Lee et al. and Okamoto.

Connected through hyperedge HE-1 (induced by source paper "statistical epistemic logic"):
  with members:
    - "local obfuscation mechanisms for hiding probability distributions"
    - "hybrid statistical estimation of mutual information and its application to information flow"
    - "towards logical specification of statistical machine learning"
    - "hyperpctl a temporal logic for probabilistic hyperproperties"
    - "on the anonymization of differentially private location obfuscation"
    - "proving differential privacy in hoare logic"
    - "statistical model checking an overview"
    - "anonymity and information hiding in multiagent systems"

Connected through hyperedge HE-2 (induced by source paper "formal analysis of an e health protocol"):
  with members:
    - "automatic verification of correspondences for security protocols"

Connected through hyperedge HE-3 (induced by source paper "an epistemic approach to compositional reasoning about anonymity and privacy"):
  with members:
    - "anonymity and information hiding in multiagent systems"

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)