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: "efficient gossip protocols for verifying the consistency of certificate logs"
  Abstract: The level of trust accorded to certification authorities has been decreasing over the last few years as several cases of misbehavior and compromise have been observed. Log-based approaches, such as Certificate Transparency, ensure that fraudulent TLS certificates become publicly visible. However, a key element that log-based approaches still lack is a way for clients to verify that the log behaves in a consistent and honest manner. This task is challenging due to privacy, efficiency, and deployability reasons. In this paper, we propose the first (to the best of our knowledge) gossip protocols that enable the detection of log inconsistencies. We analyze these protocols and present the results of a simulation based on real Internet traffic traces. We also give a deployment plan, discuss technical issues, and present an implementation.

Connected through hyperedge HE-1 (induced by source paper "the era of tls 1 3 measuring deployment and use with active and passive methods"):
  with members:
    - "an analysis of pre installed android software"
    - "the rise of certificate transparency and its implications on the internet ecosystem"
    - "a long way to the top significance structure and stability of internet top lists"
    - "a first look at quic in the wild"
    - "haystack a multi purpose mobile vantage point in user space"

Connected through hyperedge HE-2 (induced by source paper "permissionless blockchains and secure logging"):
  with members:
    - "short paper towards more reliable bitcoin timestamps"
    - "blockchain based tls notary service"
    - "pdfs practical data feed service for smart contracts"
    - "scaling nakamoto consensus to thousands of transactions per second"
    - "contour a practical system for binary transparency"

Connected through hyperedge HE-3 (induced by source paper "blockpki an automated resilient and transparent public key infrastructure"):
  with members:
    - "securify practical security analysis of smart contracts"
    - "ritm revocation in the middle"
    - "pki safety net pkisn addressing the too big to be revoked problem of the tls ecosystem"
    - "keeping authorities honest or bust with decentralized witness cosigning"

Connected through hyperedge HE-4 (induced by source paper "certledger a new pki model with certificate transparency based on blockchain"):
  with members:
    - "dtki a new formalized pki with verifiable trusted parties"
    - "keeping authorities honest or bust with decentralized witness cosigning"

Connected through hyperedge HE-5 (induced by source paper "aggregation based certificate transparency gossip"):
  with members:
    - "software distribution transparency and auditability"
    - "keeping authorities honest or bust with decentralized witness cosigning"

Connected through hyperedge HE-6 (induced by source paper "contour a practical system for binary transparency"):
  with members:
    - "an analysis of bitcoin op_return metadata"
    - "certificate transparency with privacy"
    - "certificate transparency with privacy"
    - "enhancing bitcoin security and performance with strong consistency via collective signing"
    - "keeping authorities honest or bust with decentralized witness cosigning"
    - "majority is not enough bitcoin mining is vulnerable"

Connected through hyperedge HE-7 (induced by source paper "certificate transparency with privacy"):
  with members:
    - "certificate transparency with enhancements and short proofs"
    - "keeping authorities honest or bust with decentralized witness cosigning"

Connected through hyperedge HE-8 (induced by source paper "certificate transparency with privacy"):
  with members:
    - "certificate transparency with enhancements and short proofs"
    - "keeping authorities honest or bust with decentralized witness cosigning"

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)