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: "ozone efficient execution with zero timing leakage for modern microarchitectures"
  Abstract: Time variation during program execution can leak sensitive information. Time variations due to program control flow and hardware resource contention have been used to steal encryption keys in cipher implementations such as AES and RSA. A number of approaches to mitigate timing-based side-channel attacks have been proposed including cache partitioning, control-flow obfuscation and injecting timing noise into the outputs of code. While these techniques make timing-based side-channel attacks more difficult, they do not eliminate the risks. Prior techniques are either too specific or too expensive, and all leave remnants of the original timing side channel for later attackers to attempt to exploit. #R##N#In this work, we show that the state-of-the-art techniques in timing side-channel protection, which limit timing leakage but do not eliminate it, still have significant vulnerabilities to timing-based side-channel attacks. To provide a means for total protection from timing-based side-channel attacks, we develop Ozone, the first zero timing leakage execution resource for a modern microarchitecture. Code in Ozone execute under a special hardware thread that gains exclusive access to a single core's resources for a fixed (and limited) number of cycles during which it cannot be interrupted. Memory access under Ozone thread execution is limited to a fixed size uncached scratchpad memory, and all Ozone threads begin execution with a known fixed microarchitectural state. We evaluate Ozone using a number of security sensitive kernels that have previously been targets of timing side-channel attacks, and show that Ozone eliminates timing leakage with minimal performance overhead.

Connected through hyperedge HE-1 (induced by source paper "memjam a false dependency attack against constant time crypto implementations"):
  with members:
    - "cachezoom how sgx amplifies the power of cache attacks"
    - "cacheshield protecting legacy processes against cache attacks"
    - "software grand exposure sgx cache attacks are practical"
    - "did we learn from llc side channel attacks a cache leakage detection tool for crypto libraries"
    - "a software approach to defeating side channels in last level caches"
    - "inferring fine grained control flow inside sgx enclaves with branch shadowing"
    - "rigorous analysis of software countermeasures against cache attacks"
    - "flush flush a fast and stealthy cache attack"

Connected through hyperedge HE-2 (induced by source paper "microwalk a framework for finding side channels in binaries"):
  with members:
    - "spectre attacks exploiting speculative execution"
    - "cachezoom how sgx amplifies the power of cache attacks"
    - "did we learn from llc side channel attacks a cache leakage detection tool for crypto libraries"
    - "perfweb how to violate web privacy with hardware performance events"
    - "stacco differentially analyzing side channel traces for detecting ssl tls vulnerabilities in secure enclaves"
    - "rigorous analysis of software countermeasures against cache attacks"
    - "armageddon cache attacks on mobile devices"

Connected through hyperedge HE-3 (induced by source paper "eliminating timing side channel leaks using program repair"):
  with members:
    - "adversarial symbolic execution for detecting concurrency related cache timing leaks"
    - "robust and efficient elimination of cache and timing side channels"

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)