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: "when the signal is in the noise the limits of diffix s sticky noise"
  Abstract: Finding a balance between privacy and utility, allowing researchers and businesses to use data for good while protecting people's privacy, is one of the biggest challenge we face today. A large body of research has shown the limits of the traditional anonymization (or de-identification) model prompting the use of question and answer or query-based systems. Diffix is a query-based system developed by Aircloak using the concept of "sticky noise" to protect people's privacy. We here present an attack on Diffix that exploits the structure of its sticky noise to infer private attributes of people in the dataset. We believe this vulnerability to be serious, allowing us to accurately infer private information of users with little background knowledge. While we share Diffix's creators view that we need to take a fresh look at building practical privacy-preserving systems, we believe this requires a layered security approach and fully open tools and discussions. Patented and proprietary code is unlikely to be sufficient to truly help us find a balance between the great potential of data and the basic human right of privacy.

Connected through hyperedge HE-1 (induced by source paper "pripearl a framework for privacy preserving analytics and reporting at linkedin"):
  with members:
    - "practical locally private heavy hitters"
    - "towards practical differential privacy for sql queries"
    - "collecting telemetry data privately"
    - "building a rappor with the unknown privacy preserving learning of associations and data dictionaries"
    - "rappor randomized aggregatable privacy preserving ordinal response"
    - "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)