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: "shortest paths and distances with differential privacy"
  Abstract: We introduce a model for differentially private analysis of weighted graphs in which the graph topology $(V,E)$ is assumed to be public and the private information consists only of the edge weights $w:E\to\mathbb{R}^+$. This can express hiding congestion patterns in a known system of roads. Differential privacy requires that the output of an algorithm provides little advantage, measured by privacy parameters $\epsilon$ and $\delta$, for distinguishing between neighboring inputs, which are thought of as inputs that differ on the contribution of one individual. In our model, two weight functions $w,w'$ are considered to be neighboring if they have $\ell_1$ distance at most one. #R##N#We study the problems of privately releasing a short path between a pair of vertices and of privately releasing approximate distances between all pairs of vertices. We are concerned with the approximation error, the difference between the length of the released path or released distance and the length of the shortest path or actual distance. #R##N#For privately releasing a short path between a pair of vertices, we prove a lower bound of $\Omega(|V|)$ on the additive approximation error for fixed $\epsilon,\delta$. We provide a differentially private algorithm that matches this error bound up to a logarithmic factor and releases paths between all pairs of vertices. The approximation error of our algorithm can be bounded by the number of edges on the shortest path, so we achieve better accuracy than the worst-case bound for vertex pairs that are connected by a low-weight path with $o(|V|)$ vertices. #R##N#For privately releasing all-pairs distances, we show that for trees we can release all distances with approximation error $O(\log^{2.5}|V|)$ for fixed privacy parameters. For arbitrary bounded-weight graphs with edge weights in $[0,M]$ we can release all distances with approximation error $\tilde{O}(\sqrt{|V|M})$.

Connected through hyperedge HE-1 (induced by source paper "cloud based approximate constrained shortest distance queries over encrypted graphs with privacy protection"):
  with members:
    - "secure fingerprint alignment and matching protocols"
    - "fast exact shortest path distance queries on large networks by pruned landmark labeling"
    - "mining frequent graph patterns with differential privacy"
    - "graphlab a new framework for parallel machine learning"

Connected through hyperedge HE-2 (induced by source paper "minimum spanning tree release under differential privacy constraints"):
  with members:
    - "calibrating data to sensitivity in private data analysis"

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)