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: "dandelion lightweight cryptocurrency networking with formal anonymity guarantees"
  Abstract: Recent work has demonstrated significant anonymity vulnerabilities in Bitcoin's networking stack. In particular, the current mechanism for broadcasting Bitcoin transactions allows third-party observers to link transactions to the IP addresses that originated them. This lays the groundwork for low-cost, large-scale deanonymization attacks. In this work, we present Dandelion++, a first-principles defense against large-scale deanonymization attacks with near-optimal information-theoretic guarantees. Dandelion++ builds upon a recent proposal called Dandelion that exhibited similar goals. However, in this paper, we highlight simplifying assumptions made in Dandelion, and show how they can lead to serious deanonymization attacks when violated. In contrast, Dandelion++ defends against stronger adversaries that are allowed to disobey protocol. Dandelion++ is lightweight, scalable, and completely interoperable with the existing Bitcoin network. We evaluate it through experiments on Bitcoin's mainnet (i.e., the live Bitcoin network) to demonstrate its interoperability and low broadcast latency overhead.

Connected through hyperedge HE-1 (induced by source paper "stability and scalability of blockchain systems"):
  with members:
    - "prism scaling bitcoin by 10 000x"
    - "markov processes in blockchain systems"
    - "decentralization in bitcoin and ethereum networks"
    - "dandelion redesigning the bitcoin network for anonymity"
    - "majority is not enough bitcoin mining is vulnerable"
    - "can p2p networks be super scalable"
    - "stability of a peer to peer communication system"
    - "gossiping with multiple messages"

Connected through hyperedge HE-2 (induced by source paper "on the strength of connectivity of inhomogeneous random k out graphs"):
  with members:
    - "privacy utility tradeoffs in routing cryptocurrency over payment channel networks"
    - "k connectivity in random key graphs with unreliable links"
    - "towards k connectivity in heterogeneous sensor networks under pairwise key predistribution"
    - "topological analysis of bitcoin s lightning network"
    - "high throughput cryptocurrency routing in payment channel networks"
    - "k connectivity of inhomogeneous random key graphs with unreliable links"
    - "toward k connectivity of the random graph induced by a pairwise key predistribution scheme with unreliable links"
    - "modeling the pairwise key predistribution scheme in the presence of unreliable links"

Connected through hyperedge HE-3 (induced by source paper "zipphone protecting user location privacy from cellular service providers"):
  with members:
    - "defeating the downgrade attack on identity privacy in 5g"

Connected through hyperedge HE-4 (induced by source paper "bandwidth efficient transaction relay for bitcoin"):
  with members:
    - "txprobe discovering bitcoin s network topology using orphan transactions"
    - "bitcoin ng a scalable blockchain protocol"
    - "multi party set reconciliation using characteristic polynomials"
    - "deanonymisation of clients in bitcoin p2p network"
    - "bitcoin transaction malleability and mtgox"
    - "majority is not enough bitcoin mining is vulnerable"
    - "simple multi party set reconciliation"
    - "hosting byzantine fault tolerant services on a chord ring"

Connected through hyperedge HE-5 (induced by source paper "towards k connectivity in heterogeneous sensor networks under pairwise key predistribution"):
  with members:
    - "k connectivity in random key graphs with unreliable links"
    - "k connectivity of inhomogeneous random key graphs with unreliable links"
    - "toward k connectivity of the random graph induced by a pairwise key predistribution scheme with unreliable links"

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)