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: "oei operation execution integrity for embedded devices"
  Abstract: We formulate a new security property, called "Operation Execution Integrity" or OEI, tailored for embedded devices. Inspired by the operation-oriented design of embedded programs and considering the limited hardware capabilities of embedded devices, OEI attestation enables selective and practical verification of both control-flow integrity and critical-variable integrity for an operation being executed. This attestation allows remote verifiers to detect control-flow hijacks as well as data-only attacks, including data-oriented programming, on an embedded device's capability needed for securing IoT but unachievable using existing methods. We design and build a system, called OAT, to realize and evaluate the idea of OEI attestation on ARM-based bare-metal devices. OAT features a highly efficient measurement collection mechanism, a control-flow measurement scheme designed for determinate verifiability, and a method for lightweight variable-integrity checking. When tested against real-world embedded programs on a development board, OAT incurred only a mild runtime overhead (2.7%).

Connected through hyperedge HE-1 (induced by source paper "exploitation techniques and defenses for data oriented attacks"):
  with members:
    - "sok sanitizing for security"
    - "block oriented programming automating data only attacks"
    - "hardscope thwarting dop with hardware assisted run time scope enforcement"
    - "control flow integrity precision security and performance"

Connected through hyperedge HE-2 (induced by source paper "checking is believing event aware program anomaly detection in cyber physical systems"):
  with members:
    - "hardscope thwarting dop with hardware assisted run time scope enforcement"
    - "c flat control flow attestation for embedded systems software"

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)