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: "conxsense automated context classification for context aware access control"
  Abstract: We present ConXsense, the first framework for context-aware access control on mobile devices based on context classification. Previous context-aware access control systems often require users to laboriously specify detailed policies or they rely on pre-defined policies not adequately reflecting the true preferences of users. We present the design and implementation of a context-aware framework that uses a probabilistic approach to overcome these deficiencies. The framework utilizes context sensing and machine learning to automatically classify contexts according to their security and privacy-related properties. We apply the framework to two important smartphone-related use cases: protection against device misuse using a dynamic device lock and protection against sensory malware. We ground our analysis on a sociological survey examining the perceptions and concerns of users related to contextual smartphone security and analyze the effectiveness of our approach with real-world context data. We also demonstrate the integration of our framework with the FlaskDroid architecture for fine-grained access control enforcement on the Android platform.

Connected through hyperedge HE-1 (induced by source paper "privacy enhancing context authentication from location sensitive data"):
  with members:
    - "contextual proximity detection in the face of context manipulating adversaries"
    - "flexible and robust privacy preserving implicit authentication"

Connected through hyperedge HE-2 (induced by source paper "keeping context in mind automating mobile app access control with user interface inspection"):
  with members:
    - "leaksemantic identifying abnormal sensitive network transmissions in mobile applications"
    - "the feasibility of dynamically granted permissions aligning mobile privacy with user preferences"
    - "flowintent detecting privacy leakage from user intention to network traffic mapping"
    - "demo recon revealing and controlling pii leaks in mobile network traffic"
    - "android permissions remystified a field study on contextual integrity"
    - "smote synthetic minority over sampling technique"

Connected through hyperedge HE-3 (induced by source paper "procmotive bringing programability and connectivity into isolated vehicles"):
  with members:
    - "elastic pathing your speed is enough to track you"

Connected through hyperedge HE-4 (induced by source paper "danger is my middle name experimenting with ssl vulnerabilities in android apps"):
  with members:
    - "mithys mind the hand you shake protecting mobile devices from ssl usage vulnerabilities"

Connected through hyperedge HE-5 (induced by source paper "how far removed are you scalable privacy preserving estimation of social path length with social pal"):
  with members:
    - "peershare a system secure distribution of sensitive data among social contacts"
    - "bootstrapping trust in online dating social verification of online dating profiles"
    - "pisces anonymous communication using social networks"
    - "the anatomy of the facebook social graph"
    - "four degrees of separation"

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)