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: "hang with your buddies to resist intersection attacks"
  Abstract: Some anonymity schemes might in principle protect users from pervasive network surveillance--but only if all messages are independent and unlinkable. Users in practice often need pseudonymity--sending messages intentionally linkable to each other but not to the sender--but pseudonymity in dynamic networks exposes users to intersection attacks. We present Buddies, the first systematic design for intersection attack resistance in practical anonymity systems. Buddies groups users dynamically into buddy sets, controlling message transmission to make buddies within a set behaviorally indistinguishable under traffic analysis. To manage the inevitable tradeoffs between anonymity guarantees and communication responsiveness, Buddies enables users to select independent attack mitigation policies for each pseudonym. Using trace-based simulations and a working prototype, we find that Buddies can guarantee non-trivial anonymity set sizes in realistic chat/microblogging scenarios, for both short-lived and long-lived pseudonyms.

Connected through hyperedge HE-1 (induced by source paper "prifi low latency anonymity for organizational networks"):
  with members:
    - "taranet traffic analysis resistant anonymity at the network layer"
    - "i know what you saw last minute encrypted http adaptive video streaming title classification"
    - "the loopix anonymity system"
    - "atom horizontally scaling strong anonymity"
    - "device fingerprinting in wireless networks challenges and opportunities"
    - "riposte an anonymous messaging system handling millions of users"
    - "hornet high speed onion routing at the network layer"
    - "dovetail stronger anonymity in next generation internet routing"

Connected through hyperedge HE-2 (induced by source paper "taranet traffic analysis resistant anonymity at the network layer"):
  with members:
    - "the loopix anonymity system"
    - "raptor routing attacks on privacy in tor"
    - "hornet high speed onion routing at the network layer"
    - "dovetail stronger anonymity in next generation internet routing"
    - "stealthy traffic analysis of low latency anonymous communication using throughput fingerprinting"

Connected through hyperedge HE-3 (induced by source paper "prio private robust and scalable computation of aggregate statistics"):
  with members:
    - "strong eth breaks with merlin and arthur short non interactive proofs of batch evaluation"
    - "building a rappor with the unknown privacy preserving learning of associations and data dictionaries"
    - "riposte an anonymous messaging system handling millions of users"
    - "efficient private statistics with succinct sketches"
    - "rappor randomized aggregatable privacy preserving ordinal response"
    - "proactively accountable anonymous messaging in verdict"
    - "verifying computations with streaming interactive proofs"
    - "information theoretic security without an honest majority"

Connected through hyperedge HE-4 (induced by source paper "atom horizontally scaling strong anonymity"):
  with members:
    - "the loopix anonymity system"
    - "riposte an anonymous messaging system handling millions of users"
    - "secure anonymous broadcast"

Connected through hyperedge HE-5 (induced by source paper "riposte an anonymous messaging system handling millions of users"):
  with members:
    - "proactively accountable anonymous messaging in verdict"

Connected through hyperedge HE-6 (induced by source paper "symmetric disclosure a fresh look at k anonymity"):
  with members:
    - "crypto book bootstrapping privacy preserving online identities from social networks"
    - "seeking anonymity in an internet panopticon"
    - "the anatomy of the facebook social graph"

Connected through hyperedge HE-7 (induced by source paper "seeking anonymity in an internet panopticon"):
  with members:
    - "managing nymboxes for identity and tracking protection"
    - "proactively accountable anonymous messaging in verdict"
    - "probabilistic analysis of onion routing in a black box model"

Connected through hyperedge HE-8 (induced by source paper "managing nymboxes for identity and tracking protection"):
  with members:
    - "sweet serving the web by exploiting email tunnels"

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)