human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "copycat controlled instruction level attacks on enclaves for maximal key extraction"):
  Abstract: The adversarial model presented by trusted execution environments (TEEs) has prompted researchers to investigate unusual attack vectors. One particularly powerful class of controlled-channel attacks abuses page-table modifications to reliably track enclave memory accesses at a page-level granularity. Crucially, in contrast to noisy microarchitectural timing leakages, this line of deterministic controlled-channel attacks abuses indispensable architectural interfaces and hence cannot be mitigated by tweaking microarchitectural resources. We propose an innovative controlled-channel attack, named CopyCat, that deterministically counts the number of instructions executed within a single enclave code page. We show that combining the instruction counts harvested by CopyCat with traditional, coarse-grained page-level leakage allows to accurately reconstruct enclave control flow at a maximal instruction-level granularity. CopyCat can identify intra-page and intra-cache line branch decisions which may ultimately differ only in a single instruction, highlighting that even extremely subtle control flow deviations can deterministically be leaked from secure enclaves. We demonstrate the improved resolution and practicality of CopyCat on Intel SGX platforms in an extensive study of single-trace and deterministic attacks against side-channel hardened cryptographic libraries. As a result, we disclose multiple vulnerabilities in the the latest version of widely-used cryptographic libraries: WolfSSL, Libgcrypt and OpenSSL, and propose novel algorithmic attacks to perform single-trace key extraction. Our findings mark the importance of stricter verification of cryptographic implementations, especially in the context of TEEs.

Includes members:
  Member "tpm fail tpm meets timing and lattice attacks":
    also connected through other hyperedges:
      (none)
  Member "dr sgx automated and adjustable side channel protection for sgx using data location randomization":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "on the convergence of artificial intelligence and distributed ledger technology a scoping review and future research agenda")
  Member "sgxpectre stealing intel secrets from sgx enclaves via speculative execution":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "distributed systems and trusted execution environments trade offs and challenges")
  Member "hybcache hybrid side channel resilient caches for trusted execution environments":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "dr sgx automated and adjustable side channel protection for sgx using data location randomization")
  Member "mitigating branch shadowing attacks on intel sgx using control flow randomization":
    also connected through other hyperedges:
      (none)
  Member "microwalk a framework for finding side channels in binaries":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "specusym speculative symbolic execution for cache timing leak detection")
  Member "cachezoom how sgx amplifies the power of cache attacks":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "deconstructing blockchains a comprehensive survey on consensus membership and structure")
  Member "software grand exposure sgx cache attacks are practical":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "distributed systems and trusted execution environments trade offs and challenges")

Question: Please tell me which class the source paper 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)