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: "evaluating the red belly blockchain"
  Abstract: In this paper, we present the most extensive evaluation of blockchain system to date. To achieve scalability across servers in more than 10 countries located on 4 different continents, we drastically revisited Byzantine fault tolerant blockchains and verification of signatures. The resulting blockchain, called the Red Belly Blockchain (RBBC), commits more than a hundred thousand transactions issued by permissionless nodes. These transactions are grouped into blocks within few seconds through a partially synchronous consensus run by permissioned nodes. It prevents double spending by guaranteeing that a unique block is decided at any given index of the chain in a deterministic way by all participants. We compared the performance of RBBC against traditional Byzantine fault tolerant alternatives and more recent randomized solutions. In the same geo-distributed environment with low-end machines, we noticed two interesting comparisons: (i) the RBBC throughput scales to hundreds of machines whereas the classic 3-step leader-based BFT state machine used by consortium blockchains cannot scale to 40 identically configured nodes; (ii) RBBC guarantees transaction finality in 3 seconds and experiences a third of the latency that randomized-based solutions like HoneyBadgerBFT can offer. This empirical evaluation demonstrates that blockchain scalability can be achieved without sacrificing security.

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"
    - "analysis of the xrp ledger consensus protocol"
    - "hotstuff bft consensus in the lens of 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 "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"
    - "sbft a scalable decentralized trust infrastructure for blockchains"
    - "correctness and fairness of tendermint core blockchains"

Connected through hyperedge HE-3 (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"
    - "sbft a scalable decentralized trust infrastructure for blockchains"
    - "blockchains consensus protocols in the wild"

Connected through hyperedge HE-4 (induced by source paper "dispel byzantine smr with distributed pipelining"):
  with members:
    - "mir bft high throughput bft for blockchains"
    - "certifying blockchain byzantine fault tolerance"
    - "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"
    - "bitcoin ng a scalable blockchain protocol"

Connected through hyperedge HE-5 (induced by source paper "platypus a partially synchronous offchain protocol for blockchains"):
  with members:
    - "atomic commitment across blockchains"
    - "cross chain deals and adversarial commerce"
    - "brick asynchronous state channels"
    - "atomic cross chain swaps"

Connected through hyperedge HE-6 (induced by source paper "the attack of the clones against proof of authority"):
  with members:
    - "a platform architecture for multi tenant blockchain based systems"
    - "the blockchain anomaly"
    - "majority is not enough bitcoin mining is vulnerable"

Connected through hyperedge HE-7 (induced by source paper "mir bft high throughput bft for blockchains"):
  with members:
    - "hyperledger fabric a distributed operating system for permissioned blockchains"
    - "enhancing bitcoin security and performance with strong consistency via collective signing"
    - "bitcoin ng a scalable blockchain protocol"

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.CR(Cryptography and Security)