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: "making digital artifacts on the web verifiable and reliable"
  Abstract: The current Web has no general mechanisms to make digital artifacts—such as datasets, code, texts, and images—verifiable and permanent. For digital artifacts that are supposed to be immutable, there is moreover no commonly accepted method to enforce this immutability. These shortcomings have a serious negative impact on the ability to reproduce the results of processes that rely on Web resources, which in turn heavily impacts areas such as science where reproducibility is important. To solve this problem, we propose  trusty URIs  containing cryptographic hash values. We show how trusty URIs can be used for the verification of digital artifacts, in a manner that is independent of the serialization format in the case of structured data files such as nanopublications. We demonstrate how the contents of these files become immutable, including dependencies to external digital artifacts and thereby extending the range of verifiability to the entire reference tree. Our approach sticks to the core principles of the Web, namely openness and decentralized architecture, and is fully compatible with existing standards and protocols. Evaluation of our reference implementations shows that these design goals are indeed accomplished by our approach, and that it remains practical even for very large files.

Connected through hyperedge HE-1 (induced by source paper "archive assisted archival fixity verification framework"):
  with members:
    - "mementomap framework for flexible and adaptive web archive profiling"
    - "difficulties of timestamping archived web pages"
    - "decentralized trusted timestamping using the crypto currency bitcoin"
    - "trusty uris verifiable immutable and permanent digital artifacts for linked data"
    - "http mailbox asynchronous restful communication"
    - "memento time travel for the web"
    - "preserving peer replicas by rate limited sampled voting"

Connected through hyperedge HE-2 (induced by source paper "nanopublications a growing resource of provenance centric scientific linked data"):
  with members:
    - "reliable granular references to changing linked data"
    - "nanopub java a java library for nanopublications"
    - "provenance centered dataset of drug drug interactions"
    - "trusty uris verifiable immutable and permanent digital artifacts for linked data"
    - "publishing without publishers a decentralized approach to dissemination retrieval and archiving of data"
    - "micropublications a semantic model for claims evidence arguments and annotations in biomedical communications"
    - "broadening the scope of nanopublications"

Connected through hyperedge HE-3 (induced by source paper "reliable granular references to changing linked data"):
  with members:
    - "nanopub java a java library for nanopublications"
    - "provenance centered dataset of drug drug interactions"
    - "trusty uris verifiable immutable and permanent digital artifacts for linked data"
    - "publishing without publishers a decentralized approach to dissemination retrieval and archiving of data"
    - "broadening the scope of nanopublications"
    - "an http based versioning mechanism for linked data"

Connected through hyperedge HE-4 (induced by source paper "nanopub java a java library for nanopublications"):
  with members:
    - "publishing without publishers a decentralized approach to dissemination retrieval and archiving of data"
    - "broadening the scope of nanopublications"

Connected through hyperedge HE-5 (induced by source paper "provenance centered dataset of drug drug interactions"):
  with members:
    - "trusty uris verifiable immutable and permanent digital artifacts for linked data"
    - "publishing without publishers a decentralized approach to dissemination retrieval and archiving of data"

Connected through hyperedge HE-6 (induced by source paper "publishing without publishers a decentralized approach to dissemination retrieval and archiving of data"):
  with members:
    - "science bots a model for the future of scientific computation"
    - "trusty uris verifiable immutable and permanent digital artifacts for linked data"
    - "a survey and classification of controlled natural languages"
    - "broadening the scope of nanopublications"

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)