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: "sbft a scalable and decentralized trust infrastructure"
  Abstract: SBFT is a state of the art Byzantine fault tolerant permissioned blockchain system that addresses the challenges of scalability, decentralization and world-scale geo-replication. SBFTis optimized for decentralization and can easily handle more than 200 active replicas in a real world-scale deployment. We evaluate \sysname in a world-scale geo-replicated deployment with 209 replicas withstanding f=64 Byzantine failures. We provide experiments that show how the different algorithmic ingredients of \sysname increase its performance and scalability. The results show that SBFT simultaneously provides almost 2x better throughput and about 1.5x better latency relative to a highly optimized system that implements the PBFT protocol. To achieve this performance improvement, SBFT uses a combination of four ingredients: using collectors and threshold signatures to reduce communication to linear, using an optimistic fast path, reducing client communication and utilizing redundant servers for the fast path.

Connected through hyperedge HE-1 (induced by source paper "expected linear round synchronization the missing link for linear byzantine smr"):
  with members:
    - "cogsworth byzantine view synchronization"
    - "threshold logical clocks for asynchronous distributed coordination and consensus"
    - "the latest gossip on bft consensus"
    - "competitive paging algorithms"

Connected through hyperedge HE-2 (induced by source paper "the istanbul bft consensus algorithm"):
  with members:
    - "the latest gossip on bft consensus"
    - "casper the friendly finality gadget"

Connected through hyperedge HE-3 (induced by source paper "baash enabling blockchain as a service on high performance computing systems"):
  with members:
    - "a byzantine fault tolerant ordering service for the hyperledger fabric blockchain platform"
    - "enhancing bitcoin security and performance with strong consistency via collective signing"

Connected through hyperedge HE-4 (induced by source paper "heb hybrid expenditure blockchain"):
  with members:
    - "mind the mining"
    - "squirrl automating attack discovery on blockchain incentive mechanisms with deep reinforcement learning"
    - "an axiomatic approach to block rewards"
    - "sbft a scalable decentralized trust infrastructure for blockchains"
    - "a survey on security and privacy issues of bitcoin"
    - "the gap game"
    - "bitcoin a natural oligopoly"
    - "be selfish and avoid dilemmas fork after withholding faw attacks on bitcoin"

Connected through hyperedge HE-5 (induced by source paper "can 100 machines agree"):
  with members:
    - "the consensus number of a cryptocurrency"
    - "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"
    - "revisiting fast practical byzantine fault tolerance"
    - "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-6 (induced by source paper "a secure consensus protocol for sidechains"):
  with members:
    - "selfish mining in ethereum"
    - "flash efficient dynamic routing for offchain networks"
    - "proteus a scalable bft consesus protocol for blockchains"
    - "hotstuff bft consensus in the lens of blockchain"
    - "routing cryptocurrency with the spider network"
    - "a scale out blockchain for value transfer with spontaneous sharding"
    - "window based bft blockchain consensus"
    - "sprites and state channels payment networks that go faster than lightning"

Connected through hyperedge HE-7 (induced by source paper "flexible byzantine fault tolerance"):
  with members:
    - "dfinity technology overview series consensus system"
    - "hotstuff bft consensus in the lens of blockchain"
    - "sbft a scalable decentralized trust infrastructure for blockchains"
    - "casper the friendly finality gadget"
    - "flexible paxos quorum intersection revisited"
    - "algorand the efficient and democratic ledger"
    - "xft practical fault tolerance beyond crashes"

Connected through hyperedge HE-8 (induced by source paper "cogsworth byzantine view synchronization"):
  with members:
    - "proof of execution reaching consensus through fault tolerant speculation"
    - "threshold logical clocks for asynchronous distributed coordination and consensus"
    - "the latest gossip on bft consensus"
    - "casper the friendly finality gadget"

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)