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: "dr sgx automated and adjustable side channel protection for sgx using data location randomization"
  Abstract: Recent research has demonstrated that Intel's SGX is vulnerable to software-based side-channel attacks. In a common attack, the adversary monitors CPU caches to infer secret-dependent data accesses patterns. Known defenses have major limitations, as they require either error-prone developer assistance, incur extremely high runtime overhead, or prevent only specific attacks.   In this paper, we propose data location randomization as a novel defense against side-channel attacks that target data access patterns. Our goal is to break the link between the memory observations by the adversary and the actual data accesses by the victim. We design and implement a compiler-based tool called DR.SGX that instruments the enclave code, permuting data locations at fine granularity. To prevent correlation of repeated memory accesses we periodically re-randomize all enclave data. Our solution requires no developer assistance and strikes the balance between side-channel protection and performance based on an adjustable security parameter.

Connected through hyperedge HE-1 (induced by source paper "on the convergence of artificial intelligence and distributed ledger technology a scoping review and future research agenda"):
  with members:
    - "ekiden a platform for confidentiality preserving trustworthy and performant smart contracts"
    - "energy recycling blockchain with proof of deep learning"
    - "decentralized and collaborative ai on blockchain"
    - "sok transparent dishonesty front running attacks on blockchain"
    - "reliable federated learning for mobile networks"
    - "keystone an open framework for architecting tees"
    - "tensorscone a secure tensorflow framework using intel sgx"
    - "coin ai a proof of useful work scheme for blockchain based distributed deep learning"

Connected through hyperedge HE-2 (induced by source paper "copycat controlled instruction level attacks on enclaves for maximal key extraction"):
  with members:
    - "tpm fail tpm meets timing and lattice attacks"
    - "sgxpectre stealing intel secrets from sgx enclaves via speculative execution"
    - "hybcache hybrid side channel resilient caches for trusted execution environments"
    - "mitigating branch shadowing attacks on intel sgx using control flow randomization"
    - "microwalk a framework for finding side channels in binaries"
    - "cachezoom how sgx amplifies the power of cache attacks"
    - "software grand exposure sgx cache attacks are practical"
    - "the heisenberg defense proactively defending sgx enclaves against page table based side channel attacks"

Connected through hyperedge HE-3 (induced by source paper "accelerating forward and backward private searchable encryption using trusted execution"):
  with members:
    - "software grand exposure sgx cache attacks are practical"
    - "lightbox full stack protected stateful middlebox at lightning speed"
    - "hardidx practical and secure index with sgx"

Connected through hyperedge HE-4 (induced by source paper "sgx lkl securing the host os interface for trusted execution"):
  with members:
    - "keystone an open framework for architecting tees"
    - "zombieload cross privilege boundary data sampling"
    - "interface based side channel attack against intel sgx"
    - "obladi oblivious serializable transactions in the cloud"
    - "cachezoom how sgx amplifies the power of cache attacks"
    - "oblidb oblivious query processing for secure databases"
    - "software grand exposure sgx cache attacks are practical"
    - "prochlo strong privacy for analytics in the crowd"

Connected through hyperedge HE-5 (induced by source paper "new attacks and defenses for randomized caches"):
  with members:
    - "safespec banishing the spectre of a meltdown with leakage free speculation"
    - "spectre attacks exploiting speculative execution"
    - "spectre returns speculation attacks using the return stack buffer"
    - "a software approach to defeating side channels in last level caches"
    - "flush flush a fast and stealthy cache attack"
    - "flush flush a fast and stealthy cache attack"

Connected through hyperedge HE-6 (induced by source paper "v0ltpwn attacking x86 processor integrity from software"):
  with members:
    - "ekiden a platform for confidentiality preserving trustworthy and performant smart contracts"
    - "reverse engineering x86 processor microcode"
    - "spectre attacks exploiting speculative execution"
    - "cachezoom how sgx amplifies the power of cache attacks"
    - "software grand exposure sgx cache attacks are practical"

Connected through hyperedge HE-7 (induced by source paper "pacstack an authenticated call stack"):
  with members:
    - "pac it up towards pointer integrity using arm pointer authentication"
    - "shining light on shadow stacks"
    - "cfi care hardware supported call and return enforcement for commercial microcontrollers"
    - "cryptographically enforced control flow integrity"

Connected through hyperedge HE-8 (induced by source paper "virtualization technologies and cloud security advantages issues and perspectives"):
  with members:
    - "cachezoom how sgx amplifies the power of cache attacks"
    - "hybis advanced introspection for effective windows guest protection"
    - "software grand exposure sgx cache attacks are practical"
    - "malware guard extension using sgx to conceal cache attacks"
    - "inferring fine grained control flow inside sgx enclaves with branch shadowing"
    - "security analysis of encrypted virtual machines"
    - "cuda leaks a detailed hack for cuda and a partial fix"

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)