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: "speculose analyzing the security implications of speculative execution in cpus"
  Abstract: Whenever modern CPUs encounter a conditional branch for which the condition cannot be evaluated yet, they predict the likely branch target and speculatively execute code. Such pipelining is key to optimizing runtime performance and is incorporated in CPUs for more than 15 years. In this paper, to the best of our knowledge, we are the first to study the inner workings and the security implications of such speculative execution. We revisit the assumption that speculatively executed code leaves no traces in case it is not committed. We reveal several measurable side effects that allow adversaries to enumerate mapped memory pages and to read arbitrary memory---all using only speculated code that was never fully executed. To demonstrate the practicality of such attacks, we show how a user-space adversary can probe for kernel pages to reliably break kernel-level ASLR in Linux in under three seconds and reduce the Windows 10 KASLR entropy by 18~bits in less than a second.

Connected through hyperedge HE-1 (induced by source paper "safespec banishing the spectre of a meltdown with leakage free speculation"):
  with members:
    - "speculative buffer overflows attacks and defenses"
    - "meltdownprime and spectreprime automatically synthesized attacks exploiting invalidation based coherence protocols"
    - "spectre attacks exploiting speculative execution"
    - "you shall not bypass employing data dependencies to prevent bounds check bypass"
    - "spectre returns speculation attacks using the return stack buffer"
    - "ret2spec speculative execution using return stack buffers"
    - "a systematic evaluation of transient execution attacks and defenses"
    - "lazyfp leaking fpu register state using microarchitectural side channels"

Connected through hyperedge HE-2 (induced by source paper "netspectre read arbitrary memory over network"):
  with members:
    - "meltdownprime and spectreprime automatically synthesized attacks exploiting invalidation based coherence protocols"
    - "spectre attacks exploiting speculative execution"
    - "automated detection exploitation and elimination of double fetch bugs using modern cpu features"
    - "inferring fine grained control flow inside sgx enclaves with branch shadowing"
    - "armageddon cache attacks on mobile devices"
    - "airhopper bridging the air gap between isolated networks and mobile phones using radio frequencies"

Connected through hyperedge HE-3 (induced by source paper "spectre returns speculation attacks using the return stack buffer"):
  with members:
    - "safespec banishing the spectre of a meltdown with leakage free speculation"
    - "meltdownprime and spectreprime automatically synthesized attacks exploiting invalidation based coherence protocols"
    - "spectre attacks exploiting speculative execution"
    - "inferring fine grained control flow inside sgx enclaves with branch shadowing"

Connected through hyperedge HE-4 (induced by source paper "ret2spec speculative execution using return stack buffers"):
  with members:
    - "spectre attacks exploiting speculative execution"
    - "spectre returns speculation attacks using the return stack buffer"
    - "armageddon cache attacks on mobile devices"
    - "rowhammer js a remote software induced fault attack in javascript"

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)