human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "a permit based optimistic byzantine ledger"):
  Abstract: PermitBFT solves the byzantine consensus problem for n nodes tolerating up to $f < \frac{n}{3}$ byzantine nodes in the partially synchronous networking model; it is the first BFT protocol to achieve an optimistic latency of just 2 message delays despite tolerating byzantine failures throughout the "fast track". The design of PermitBFT relies on two fundamental concepts. First, in PermitBFT the participating nodes do not wait for a distinguished leader to act and subsequently confirm its actions, but send permits to the next designated block creator proactively. Second, PermitBFT achieves a separation of the decision powers that are usually concentrated on a single leader node. A block creator controls which transactions to include in a new block, but not where to append the block in the block graph.

Includes members:
  Member "proteus a scalable bft consesus protocol for blockchains":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "a secure consensus protocol for sidechains")
  Member "the latest gossip on bft consensus":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "tenderbake classical bft style consensus for public blockchains")
  Member "hotstuff bft consensus in the lens of blockchain":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "surface a practical blockchain consensus algorithm for real world networks")
  Member "correction to byzantine agreement in expected polynomial time jacm 2016":
    also connected through other hyperedges:
      (none)
  Member "sbft a scalable decentralized trust infrastructure for blockchains":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "heb hybrid expenditure blockchain")
  Member "practical synchronous byzantine consensus":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "on probabilistic byzantine fault tolerance")
  Member "efficient synchronous byzantine consensus":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "on probabilistic byzantine fault tolerance")

Question: Please tell me which class the source paper 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)