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: "quire lightweight provenance for smart phone operating systems"
  Abstract: Smartphone apps often run with full privileges to access the network and sensitive local resources, making it difficult for remote systems to have any trust in the provenance of network connections they receive. Even within the phone, different apps with different privileges can communicate with one another, allowing one app to trick another into improperly exercising its privileges (a Confused Deputy attack). In Quire, we engineered two new security mechanisms into Android to address these issues. First, we track the call chain of IPCs, allowing an app the choice of operating with the diminished privileges of its callers or to act explicitly on its own behalf. Second, a lightweight signature scheme allows any app to create a signed statement that can be verified anywhere inside the phone. Both of these mechanisms are reflected in network RPCs, allowing remote systems visibility into the state of the phone when an RPC is made. We demonstrate the usefulness of Quire with two example applications. We built an advertising service, running distinctly from the app which wants to display ads, which can validate clicks passed to it from its host. We also built a payment service, allowing an app to issue a request which the payment service validates with the user. An app cannot not forge a payment request by directly connecting to the remote server, nor can the local payment service tamper with the request.

Connected through hyperedge HE-1 (induced by source paper "secloak arm trustzone based mobile peripheral control"):
  with members:
    - "trustshadow secure execution of unmodified applications with arm trustzone"
    - "sgxio generic trusted i o path for intel sgx"
    - "enter sandbox android sandbox comparison"
    - "pin skimming exploiting the ambient light sensor in mobile devices"

Connected through hyperedge HE-2 (induced by source paper "pyronia redesigning least privilege and isolation for the age of iot"):
  with members:
    - "spectre attacks exploiting speculative execution"
    - "longitudinal analysis of android ad library permissions"
    - "adsplit separating smartphone advertising from applications"

Connected through hyperedge HE-3 (induced by source paper "pyronia intra process access control for iot applications"):
  with members:
    - "adsplit separating smartphone advertising from applications"

Connected through hyperedge HE-4 (induced by source paper "discovering flaws in security focused static analysis tools for android using systematic mutation"):
  with members:
    - "horndroid practical and sound static analysis of android applications by smt solving"
    - "crashscope a practical tool for automated testing of android applications"
    - "enabling mutation testing for android apps"
    - "automatically discovering reporting and reproducing android application crashes"
    - "adsplit separating smartphone advertising from applications"

Connected through hyperedge HE-5 (induced by source paper "sclib a practical and lightweight defense against component hijacking in android applications"):
  with members:
    - "measuring the declared sdk versions and their consistency with api calls in android apps"
    - "indirect file leaks in mobile applications"
    - "analyzing android browser apps for file vulnerabilities"
    - "a sink driven approach to detecting exposed component vulnerabilities in android apps"

Connected through hyperedge HE-6 (induced by source paper "a study of data store based home automation"):
  with members:
    - "soteria automated iot safety and security analysis"
    - "danger is my middle name experimenting with ssl vulnerabilities in android apps"

Connected through hyperedge HE-7 (induced by source paper "android inter app communication threats and detection techniques"):
  with members:
    - "towards automated android app collusion detection"
    - "android security framework enabling generic and extensible access control on android"
    - "cross site scripting attacks on android webview"
    - "a case of collusion a study of the interface between ad libraries and their apps"
    - "adsplit separating smartphone advertising from applications"
    - "dexpler converting android dalvik bytecode to jimple for static analysis with soot"

Connected through hyperedge HE-8 (induced by source paper "cross platform analysis of indirect file leaks in android and ios applications"):
  with members:
    - "indirect file leaks in mobile applications"
    - "analyzing android browser apps for file vulnerabilities"
    - "a sink driven approach to detecting exposed component vulnerabilities in android apps"

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)