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: "bitcoin meets strong consistency"
  Abstract: The Bitcoin system only provides eventual consistency. For everyday life, the time to confirm a Bitcoin transaction is prohibitively slow. In this paper we propose a new system, built on the Bitcoin blockchain, which enables strong consistency. Our system, PeerCensus, acts as a certification authority, manages peer identities in a peer-to-peer network, and ultimately enhances Bitcoin and similar systems with strong consistency. Our extensive analysis shows that PeerCensus is in a secure state with high probability. We also show how Discoin, a Bitcoin variant that decouples block creation and transaction confirmation, can be built on top of PeerCensus, enabling real-time payments. Unlike Bitcoin, once transactions in Discoin are committed, they stay committed.

Connected through hyperedge HE-1 (induced by source paper "on the feasibility of sybil attacks in shard based permissionless blockchains"):
  with members:
    - "polyshard coded sharding achieves linearly scaling efficiency and security simultaneously"
    - "chain of trust can trusted hardware help scaling blockchains"
    - "towards scaling blockchain systems via sharding"
    - "a survey on security and privacy issues of bitcoin"
    - "lagrange coded computing optimal design for resiliency security and privacy"
    - "blockchain mining games"
    - "enhancing bitcoin security and performance with strong consistency via collective signing"
    - "solida a blockchain protocol based on reconfigurable byzantine consensus"

Connected through hyperedge HE-2 (induced by source paper "brick asynchronous payment channels"):
  with members:
    - "towards secure and efficient payment channels"
    - "enhancing bitcoin security and performance with strong consistency via collective signing"

Connected through hyperedge HE-3 (induced by source paper "a survey on consensus mechanisms and mining strategy management in blockchain networks"):
  with members:
    - "decentralization in bitcoin and ethereum networks"
    - "information and communications technologies for sustainable development goals state of the art needs and perspectives"
    - "a scale out blockchain for value transfer with spontaneous sharding"
    - "a survey on security and privacy issues of bitcoin"
    - "on cyber risk management of blockchain networks a game theoretic approach"
    - "scaling nakamoto consensus to thousands of transactions per second"
    - "competitive data trading in wireless powered internet of things iot crowdsensing systems with blockchain"
    - "blockchained on device federated learning"

Connected through hyperedge HE-4 (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"
    - "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"

Connected through hyperedge HE-5 (induced by source paper "a survey of distributed consensus protocols for blockchain networks"):
  with members:
    - "deconstructing blockchains a comprehensive survey on consensus membership and structure"
    - "a survey on consensus mechanisms and mining strategy management in blockchain networks"
    - "scalable bft consensus mechanism through aggregated signature gossip"
    - "asymmetric distributed trust"
    - "decentralization in bitcoin and ethereum networks"
    - "hyperledger fabric a distributed operating system for permissioned blockchains"
    - "scaling nakamoto consensus to thousands of transactions per second"
    - "correctness and fairness of tendermint core blockchains"

Connected through hyperedge HE-6 (induced by source paper "hotpow finality from proof of work quorums"):
  with members:
    - "all that glitters is not bitcoin unveiling the centralized nature of the btc ip network"
    - "squirrl automating attack discovery on blockchain incentive mechanisms with deep reinforcement learning"
    - "the consensus number of a cryptocurrency"
    - "txprobe discovering bitcoin s network topology using orphan transactions"
    - "consensus in the age of blockchains"
    - "bobtail a proof of work target that minimizes blockchain mining variance draft"
    - "hijacking bitcoin routing attacks on cryptocurrencies"
    - "blockchain mining games"

Connected through hyperedge HE-7 (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"
    - "revisiting fast practical byzantine fault tolerance"

Connected through hyperedge HE-8 (induced by source paper "on fairness in committee based blockchains"):
  with members:
    - "cryptocurrency egalitarianism a quantitative approach"
    - "fairledger a fair blockchain protocol for financial institutions"
    - "dissecting tendermint"
    - "blockchain abstract data type"
    - "compounding of wealth in proof of stake cryptocurrencies"
    - "hyperledger fabric a distributed operating system for permissioned blockchains"
    - "sbft a scalable decentralized trust infrastructure for blockchains"
    - "leader randomization signature free byzantine consensus for consortium 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)