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: "analysis of the xrp ledger consensus protocol"
  Abstract: The XRP Ledger Consensus Protocol is a previously developed consensus protocol powering the XRP Ledger. It is a low-latency Byzantine agreement protocol, capable of reaching consensus without full agreement on which nodes are members of the network. We present a detailed explanation of the algorithm and derive conditions for its safety and liveness.

Connected through hyperedge HE-1 (induced by source paper "deconstructing blockchains a comprehensive survey on consensus membership and structure"):
  with members:
    - "dfinity technology overview series consensus system"
    - "hotstuff bft consensus in the lens of blockchain"
    - "evaluating the red belly blockchain"
    - "an empirical analysis of anonymity in zcash"
    - "a survey on security and privacy issues of bitcoin"
    - "blockchains consensus protocols in the wild"
    - "cachezoom how sgx amplifies the power of cache attacks"
    - "consensus in the age of blockchains"

Connected through hyperedge HE-2 (induced by source paper "blockchain for internet of things a survey"):
  with members:
    - "an overview on smart contracts challenges advances and platforms"
    - "repchain a reputation based secure fast and high incentive blockchain system via sharding"
    - "uav communications for 5g and beyond recent advances and future trends"
    - "big data analytics for large scale wireless networks challenges and opportunities"
    - "big data analytics for manufacturing internet of things opportunities challenges and enabling technologies"
    - "sabre protecting bitcoin against routing attacks"
    - "how to make a digital currency on a blockchain stable"
    - "a survey on the security of blockchain systems"

Connected through hyperedge HE-3 (induced by source paper "formal verification of blockchain byzantine fault tolerance"):
  with members:
    - "on the correctness of egalitarian paxos"
    - "correctness analysis of ibft"
    - "the consensus number of a cryptocurrency"
    - "dissecting tendermint"
    - "the latest gossip on bft consensus"
    - "evaluating the red belly blockchain"
    - "sbft a scalable decentralized trust infrastructure for blockchains"
    - "correctness and fairness of tendermint core blockchains"

Connected through hyperedge HE-4 (induced by source paper "certifying blockchain byzantine fault tolerance"):
  with members:
    - "on the correctness of egalitarian paxos"
    - "correctness analysis of ibft"
    - "the consensus number of a cryptocurrency"
    - "dissecting tendermint"
    - "the latest gossip on bft consensus"
    - "evaluating the red belly blockchain"
    - "sbft a scalable decentralized trust infrastructure for blockchains"
    - "blockchains consensus protocols in the wild"

Connected through hyperedge HE-5 (induced by source paper "decentralization in open quorum systems"):
  with members:
    - "complexity of the quorum intersection property of the federated byzantine agreement system"
    - "is stellar as secure as you think"
    - "cobalt bft governance in open networks"
    - "blockchains consensus protocols in the wild"
    - "a tutorial on modeling and analysis of dynamic social networks part i"
    - "majority is not enough bitcoin mining is vulnerable"

Connected through hyperedge HE-6 (induced by source paper "transactional properties of permissioned blockchains"):
  with members:
    - "the latest gossip on bft consensus"
    - "hyperledger fabric a distributed operating system for permissioned blockchains"
    - "a byzantine fault tolerant ordering service for the hyperledger fabric blockchain platform"

Connected through hyperedge HE-7 (induced by source paper "asymmetric distributed trust"):
  with members:
    - "hyperledger fabric a distributed operating system for permissioned blockchains"
    - "blockchains consensus protocols in the wild"

Connected through hyperedge HE-8 (induced by source paper "an uncertainty and collusion proof voting consensus mechanism in blockchain"):
  with members:
    - "majority is not enough bitcoin mining is vulnerable"

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.DC(Distributed, Parallel, and Cluster Computing)