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: "hotstuff bft consensus in the lens of blockchain"
  Abstract: We present HotStuff, a leader-based Byzantine fault-tolerant replication protocol for the partially synchronous model. Once network communication becomes synchronous, HotStuff enables a correct leader to drive the protocol to consensus at the pace of actual (vs. maximum) network delay--a property called responsiveness--and with communication complexity that is linear in the number of replicas. To our knowledge, HotStuff is the first partially synchronous BFT replication protocol exhibiting these combined properties. HotStuff is built around a novel framework that forms a bridge between classical BFT foundations and blockchains. It allows the expression of other known protocols (DLS, PBFT, Tendermint, Casper), and ours, in a common framework. #R##N#Our deployment of HotStuff over a network with over 100 replicas achieves throughput and latency comparable to that of BFT-SMaRt, while enjoying linear communication footprint during leader failover (vs. quadratic with BFT-SMaRt).

Connected through hyperedge HE-1 (induced by source paper "surface a practical blockchain consensus algorithm for real world networks"):
  with members:
    - "rationality is self defeating in permissionless systems"
    - "dfinity technology overview series consensus system"
    - "deconstructing the blockchain to approach physical limits"
    - "scaling nakamoto consensus to thousands of transactions per second"
    - "transaction propagation on permissionless blockchains incentive and routing mechanisms"
    - "implicit consensus blockchain with unbounded throughput"
    - "chainspace a sharded smart contracts platform"
    - "casper the friendly finality gadget"

Connected through hyperedge HE-2 (induced by source paper "on exploiting transaction concurrency to speed up blockchains"):
  with members:
    - "blockchains and distributed databases a twin study"
    - "the security reference architecture for blockchains towards a standardized model for studying vulnerabilities threats and defenses"
    - "an empirical study of speculative concurrency in ethereum smart contracts"
    - "a concurrent perspective on smart contracts"
    - "adding concurrency to smart contracts"
    - "blockbench a framework for analyzing private blockchains"
    - "untangling blockchain a data processing view of blockchain systems"

Connected through hyperedge HE-3 (induced by source paper "flow separating consensus and compute block formation and execution"):
  with members:
    - "flow separating consensus and compute execution verification"
    - "flow separating consensus and compute"
    - "dfinity technology overview series consensus system"

Connected through hyperedge HE-4 (induced by source paper "combining ghost and casper"):
  with members:
    - "dfinity technology overview series consensus system"
    - "the latest gossip on bft consensus"
    - "casper the friendly finality gadget"

Connected through hyperedge HE-5 (induced by source paper "deconstructing blockchains a comprehensive survey on consensus membership and structure"):
  with members:
    - "dfinity technology overview series consensus system"
    - "analysis of the xrp ledger consensus protocol"
    - "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-6 (induced by source paper "drynx decentralized secure verifiable system for statistical queries and machine learning on distributed datasets"):
  with members:
    - "helen maliciously secure coopetitive learning for linear models"
    - "evaluating differentially private machine learning in practice"
    - "dp admm admm based distributed learning with differential privacy"
    - "gazelle a low latency framework for secure neural network inference"
    - "plausible deniability for privacy preserving data synthesis"
    - "differentially private federated learning a client level perspective"
    - "towards practical differential privacy for sql queries"
    - "smcql secure querying for federated databases"

Connected through hyperedge HE-7 (induced by source paper "ostraka secure blockchain scaling by node sharding"):
  with members:
    - "decentralization in bitcoin and ethereum networks"
    - "split scale scaling bitcoin by partitioning the utxo space"
    - "dietcoin shortcutting the bitcoin verification process for your smartphone"
    - "chainspace a sharded smart contracts platform"
    - "adding concurrency to smart contracts"
    - "casper the friendly finality gadget"
    - "enhancing bitcoin security and performance with strong consistency via collective signing"
    - "service oriented sharding with aspen"

Connected through hyperedge HE-8 (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"
    - "sbft a scalable and decentralized trust infrastructure"
    - "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"

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)