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: "revisiting fast practical byzantine fault tolerance"
  Abstract: In this note, we observe a safety violation in Zyzzyva and a liveness violation in FaB. To demonstrate these issues, we require relatively simple scenarios, involving only four replicas, and one or two view changes. In all of them, the problem is manifested already in the first log slot.

Connected through hyperedge HE-1 (induced by source paper "que sera consensus simple asynchronous agreement with private coins and threshold logical clocks"):
  with members:
    - "formal verification of multi paxos for distributed consensus"
    - "enhancing bitcoin security and performance with strong consistency via collective signing"
    - "keeping authorities honest or bust with decentralized witness cosigning"
    - "on reducing the complexity of matrix clocks"
    - "randomized protocols for asynchronous consensus"

Connected through hyperedge HE-2 (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"
    - "analysis of the xrp ledger consensus protocol"
    - "evaluating the red belly blockchain"
    - "sbft a scalable decentralized trust infrastructure for blockchains"

Connected through hyperedge HE-3 (induced by source paper "can 100 machines agree"):
  with members:
    - "the consensus number of a cryptocurrency"
    - "sbft a scalable and decentralized trust infrastructure"
    - "hyperledger fabric a distributed operating system for permissioned blockchains"
    - "sbft a scalable decentralized trust infrastructure for blockchains"
    - "a byzantine fault tolerant ordering service for the hyperledger fabric blockchain platform"
    - "enhancing bitcoin security and performance with strong consistency via collective signing"
    - "incremental consistency guarantees for replicated objects"
    - "xft practical fault tolerance beyond crashes"

Connected through hyperedge HE-4 (induced by source paper "proof of execution reaching consensus through fault tolerant speculation"):
  with members:
    - "blockchain meets database design and implementation of a blockchain relational database"
    - "vchain enabling verifiable boolean range queries over blockchain databases"
    - "towards scaling blockchain systems via sharding"
    - "scaling nakamoto consensus to thousands of transactions per second"
    - "the gap game"
    - "proof of work without all the work"
    - "blockbench a framework for analyzing private blockchains"
    - "enhancing bitcoin security and performance with strong consistency via collective signing"

Connected through hyperedge HE-5 (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"
    - "analysis of the xrp ledger consensus protocol"
    - "evaluating the red belly blockchain"
    - "sbft a scalable decentralized trust infrastructure for blockchains"

Connected through hyperedge HE-6 (induced by source paper "permissioned blockchain through the looking glass architectural and implementation lessons learned"):
  with members:
    - "proof of execution reaching consensus through fault tolerant speculation"
    - "scaling blockchain databases through parallel resilient consensus paradigm"
    - "scalable byzantine consensus via hardware assisted secret sharing"
    - "revisiting consensus protocols through wait free parallelization"
    - "streamchain do blockchains need blocks"
    - "hyperledger fabric a distributed operating system for permissioned blockchains"
    - "scaling nakamoto consensus to thousands of transactions per second"
    - "enhancing bitcoin security and performance with strong consistency via collective signing"

Connected through hyperedge HE-7 (induced by source paper "the consensus number of a cryptocurrency"):
  with members:
    - "hyperledger fabric a distributed operating system for permissioned blockchains"
    - "blockchains consensus protocols in the wild"
    - "a byzantine fault tolerant ordering service for the hyperledger fabric blockchain platform"
    - "enhancing bitcoin security and performance with strong consistency via collective signing"
    - "solida a blockchain protocol based on reconfigurable byzantine consensus"
    - "bitcoin meets strong consistency"
    - "cryptocurrencies without proof of work"

Connected through hyperedge HE-8 (induced by source paper "scaling blockchain databases through parallel resilient consensus paradigm"):
  with members:
    - "blockchain meets database design and implementation of a blockchain relational database"
    - "mir bft high throughput bft for blockchains"
    - "vchain enabling verifiable boolean range queries over blockchain databases"
    - "towards scaling blockchain systems via sharding"
    - "scaling nakamoto consensus to thousands of transactions per second"
    - "blockbench a framework for analyzing private blockchains"

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)