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: "compositional security and collateral leakage"
  Abstract: In quantitative information flow we say that program Q is “at least as secure as” P just when the amount of secret information flowing from Q is never more than flows from P , with of course a suitable quantification of “flow”. This secure-refinement order v is compositional just when PvQ implies C(P )vC(Q) for any context C, again with a suitable definition of “context”. Remarkable however is that leaks caused by executing P,Q might not be limited to their declared variables: they might impact correlated secrets in variables declared and initialised in some broader context to which P,Q do not refer even implicitly. We call such leaks collateral because their effect is felt in domains of which (the programmers of) P,Q might be wholly unaware: our inspiration is the “Dalenius” phenomenon for statistical databases [9, 11]. We show that a proper treatment of these collateral leaks is necessary for a compositional program semantics for read/write “open” programs. By adapting a recent Hidden-Markov denotational model for non-interference security [21, 22], so that it becomes “collateral aware”, we give techniques and examples (e.g. public-key encryption) to show how collateral leakage can be calculated and then bounded in its severity.

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)