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 "leveraging protection and efficiency of query answering in heterogenous rdf data using blockchain"):
  Abstract: The Semantic Web, an extension of the current web, provides a common framework that makes data machine understandable and also allows data to be shared and reused across various applications. Resource Description Framework (RDF), a graph-based data model for describing things (entities), facilitates data integration. Due to the explosion of the amount of RDF data, developing tools to support processing and answering of complex queries over the integrated data has become challenging. To overcome this challenge in query processing in semantic data integration frameworks, we provide a view layer inserted between the heterogeneous data sources and user interface layer while ensuring only authorized users are allowed access to the information. The view layer must provide a support in terms of access, integration, querying, management of data sources in a multi-user environment.

Includes members:
  Member "multi authority attribute based access control with smart contract":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "attribute based multi signature and encryption for ehr management a blockchain based solution")
  Member "introducing a hybrid model of dea and data mining in evaluating efficiency case study bank branches":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "k relevance vectors for pattern classification")
  Member "sustainable blockchain enabled services smart contracts":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "the evolution of embedding metadata in blockchain transactions")
  Member "building an ontology for the domain of plant science using protege":
    also connected through other hyperedges:
      (none)
  Member "blockchain inspired event recording system for autonomous vehicles":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "b ride ride sharing with privacy preservation trust and fair payment atop public blockchain")
  Member "blockchain access control ecosystem for big data security":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "multi authority attribute based access control with smart contract")
  Member "searching and establishment of s p o relationships for linked rdf graphs an adaptive approach":
    also connected through other hyperedges:
      (none)

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.CR(Cryptography and Security)