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: "cloud fog computing resource management and pricing for blockchain networks"
  Abstract: The mining process in blockchain requires solving a proof-of-work puzzle, which is resource expensive to implement in mobile devices due to the high computing power and energy needed. In this paper, we, for the first time, consider edge computing as an enabler for mobile blockchain. In particular, we study edge computing resource management and pricing to support mobile blockchain applications in which the mining process of miners can be offloaded to an edge computing service provider. We formulate a two-stage Stackelberg game to jointly maximize the profit of the edge computing service provider and the individual utilities of the miners. In the first stage, the service provider sets the price of edge computing nodes. In the second stage, the miners decide on the service demand to purchase based on the observed prices. We apply the backward induction to analyze the sub-game perfect equilibrium in each stage for both uniform and discriminatory pricing schemes. For the uniform pricing where the same price is applied to all miners, the existence and uniqueness of Stackelberg equilibrium are validated by identifying the best response strategies of the miners. For the discriminatory pricing where the different prices are applied to different miners, the Stackelberg equilibrium is proved to exist and be unique by capitalizing on the Variational Inequality theory. Further, the real experimental results are employed to justify our proposed model.

Connected through hyperedge HE-1 (induced by source paper "blockchain as a service for multi access edge computing a deep reinforcement learning approach"):
  with members:
    - "integration of blockchain and cloud of things architecture applications and challenges"
    - "blockchain for 5g and beyond networks a state of the art survey"

Connected through hyperedge HE-2 (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-3 (induced by source paper "integration of blockchain and cloud of things architecture applications and challenges"):
  with members:
    - "ekiden a platform for confidentiality preserving trustworthy and performant smart contracts"
    - "blockchain technologies for the internet of things research issues and challenges"
    - "a survey on consensus mechanisms and mining strategy management in blockchain networks"
    - "designing a blockchain based iot with ethereum swarm and lora the software solution to create high availability with minimal security risks"
    - "energy crowdsourcing and peer to peer energy trading in blockchain enabled smart grids"
    - "bpds a blockchain based privacy preserving data sharing for electronic medical records"
    - "a survey on the security of blockchain systems"
    - "wip a novel blockchain based trust model for cloud identity management"

Connected through hyperedge HE-4 (induced by source paper "when energy trading meets blockchain in electrical power system the state of the art"):
  with members:
    - "blockchain technologies for the internet of things research issues and challenges"
    - "decentralized p2p energy trading under network constraints in a low voltage network"
    - "on the applicability of distributed ledger architectures to peer to peer energy trading framework"
    - "peer to peer and community based markets a comprehensive review"
    - "peer to peer energytrade a distributed private energy trading platform"
    - "secure and privacy friendly local electricity trading and billing in smart grid"
    - "peer to peer energy trading with sustainable user participation a game theoretic approach"
    - "privacy preserving and efficient aggregation based on blockchain for power grid communications in smart communities"

Connected through hyperedge HE-5 (induced by source paper "computation offloading in the untrusted mec aided mobile blockchain iot system"):
  with members:
    - "when internet of things meets blockchain challenges in distributed consensus"
    - "blockchain for internet of things a survey"
    - "delay and communication tradeoffs for blockchain systems with lightweight iot clients"
    - "auction mechanisms in cloud fog computing resource allocation for public blockchain networks"
    - "analysis of the communication traffic for blockchain synchronization of iot devices"
    - "when mobile blockchain meets edge computing"
    - "a survey on mobile edge computing the communication perspective"
    - "social welfare maximization auction in edge computing resource allocation for mobile blockchain"

Connected through hyperedge HE-6 (induced by source paper "practical modeling and analysis of blockchain radio access network"):
  with members:
    - "a survey on consensus mechanisms and mining strategy management in blockchain networks"
    - "delay and communication tradeoffs for blockchain systems with lightweight iot clients"
    - "smart contract slas for dense small cell as a service"
    - "analysis of hashrate based double spending"

Connected through hyperedge HE-7 (induced by source paper "when internet of things meets blockchain challenges in distributed consensus"):
  with members:
    - "blockchain a distributed solution to automotive security and privacy"

Connected through hyperedge HE-8 (induced by source paper "edgechain an edge iot framework and prototype based on blockchain and smart contracts"):
  with members:
    - "smart contract based access control for the internet of things"
    - "using blockchain and smart contracts for secure data provenance management"
    - "when mobile blockchain meets edge computing"
    - "blockchain in internet of things challenges and solutions"

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)